Tag Archives: militariana

M1 CATTB Revisited

A couple years ago, I wrote on the very cool experimental M1 CATTB. Having found some more information on the vehicle, I decided to revisit it.

We’ve talked a little about the new gun, engine, and turret already. Let’s look at the autoloader. The autoloader was the same chain-style autoloader found on Leclerc and K2, and it held 17 rounds of either 120 mm or 140 mm ammunition. 140 mm ammunition was two-piece, and was stored in its ready to fire configuration in the bustle, which accounts for a lot of its length. The new powerpack opened up more room at the rear of the hull, and this was used for reserve ammo stowage. The reserve stowage could hold 22 140 mm rounds separated into the two pieces, or 33 120 mm rounds. There was also a mechanical ammunition transfer system to refill the ready magazine from the reserve stowage.

The new powerpack was the AIPS, and it had a total1 volume of 4.81 m3. This is a savings of about 3.5 m3 of space, which was used for the ammunition stowage mentioned above. The engine itself displaced 1,682 cubic inches, with an oil cooling system. It used a special oil to handle higher temperatures better. A key advantage of the oil-only cooling system was that it was much more compact than a water cooling system and used less power to run the cooling fans, needing only 120 HP for the cooling fans instead of 240 like most other 1,500 HP diesels of the time.

CATTB also featured a brand new track. The old track had two 9-inch wide track shoes mounted side-by-side, spanning the width of the track pins. Track guides (which travel between the roadwheel pairs) were bolted between the shoes. The new track for the CATTB had a single 25-inch wide shoe to span the pins and integrated the track guide with the shoe. This was intended to uniformly distribute pin loading and increase track life. The goal was 5,000-6,000 miles of track life, more than double that of the older tracks, which was approximately 2,500 miles.

CATTB replaced the torsion bar suspension of the M1 with an in-arm hydropneumatic suspension system. There were two designs that were being tested. Switching to a hydropneumatic suspension saved about 1,700 pounds in the vehicle, and frees up several inches of space in the hull, to lower the vehicle silhouette or to add extra belly protection. Being a test bed, neither option was selected on the CATTB.

In my previous article, I commented on the very large number of smoke grenade dischargers on the CATTB. These were for an early soft-kill active protection system. The sensors cueing it were a radar warning receiver and a laser warning receiver. It could automatically fire smoke to obscure the tank, or automatically slew the gun to face the threat. I’d be concerned about its effectiveness without additional IR or radar-based missile approach warning systems.

CATTB was also projected to test the Multi-sensor Target Acquisition System (MTAS). This added a low-power millimeter-wave radar to the tank, with a field of view of 180° in azimuth and 7.5° in elevation. Range was projected to be about 5 km.

Since this is a test bed, it’s not intended to enter mass production, so I won’t evaluate it as such. But I will review the new features:

  • I think the turret design is a pretty good one and it looks cool. If you’re going for a manned turret and aren’t trying to reduce the profile like Leclerc, I think it’s a solid design. But I’d prefer an unmanned turret like TTB/T-14.
  • Provided you’re ok with the two-man turret, the autoloader is solid. The really nice feature is the auto-resupply from reserve stowage to the ready stowage of the autoloader. And 39 rounds of 140 mm is a pretty good capacity. 50 rounds of 120mm is also a good loadout.
  • I’m kind of skeptical of the engine, since this hasn’t been tried anywhere else to my knowledge. There’s probably an SAE paper somewhere behind a paywall that would tell me why. Anyway, I’m also skeptical of the idea of needing ‘special oil’ for my tanks. Plus, there are some other smallish, proven 1,500 HP diesels available these days.
  • New track seems better than the old track. More life and fewer parts. Sold.
  • Hydropneumatic suspension is better than torsion bar suspension. More room in the floor for mine protection or more room for systems or less hull height is a really good thing. Active hydropneumatic even allows you to get a bit more elevation/depression out of your gun, which can help make the turret roof lower.
  • I love active protection systems, but this seems a bit early yet. It probably would have been worked out with more testing, but I’d like more ways to cue the system. Also, I strongly prefer having hard-kill capability. At the time, it’d be worth the work, but now there are a ton of off-the-shelf systems that just work. And are hard-kill to boot.
  • Radar tracking/targeting is a cool supplement to thermals. And if you set it up right, you can use it for missile approach warning too. I’d just want a way to switch it off sometimes.

  1. Engine, transmission, cooling system, final drives, power generators, batteries and fuel for one battlefield day 

Fishbreath Plays: Armored Brigade Review

As the annual treachery of daylight saving’s close casts its pall over Many Words HQ here in Western Pennsylvania, we turn our attention to another hilly part of the world of somewhat greater interest to wargamers and the broader defense affairs community: the Fulda Gap.

Flashpoint Campaigns: Red Storm is my current recommendation for the definitive Cold War armored combat command experience. Can Armored Brigade unseat it? Read on to find out!

Continue reading

On the OMFV

We’ve had some recent news on the OMFV program, with Rheinmetall being disqualified for not showing up for the Engineering & Manufacturing Design (EMD) phase, so let’s dig in.

First, let’s laugh a bit at the “competition” now with a single entrant. Even though, technically, someone else could enter a bid in 2023. If the program stays around that long. Those competitors wouldn’t get US Army funding and feedback from the EMD portion of the program, so they’d be at a significant financial disadvantage.

Okay, now that we’ve gotten our snark out of the way, let’s get serious. Yet again, we’re trying to replace the Bradley. What are the problems with the Bradley? So far, I’ve found the following three commonly cited (in no particular order):

1) Insufficient protection against current and near future threats, even with existing up-armor kits installed.
2) Insufficient power capacity for all current systems, let alone future upgrades.
3) Insufficient dismount capacity.

That said, OMFV only seems to worry about (1) and (2), since it does not require entrants to carry a full, nine-man dismount squad. And the one entrant from General Dynamics (which I believe is called Griffin IV), has capacity for the minimum required dismounts only. I think we’re still waiting on the DTIC or RAND corp. study on “Why Six Dismounts is Sufficient”, after they so kindly wrote a bit on why it’s so important for the GCV to carry nine dismounts.1

Anyway, the current requirements are tough enough. The following three are probably going to be extremely tough to meet:

  • Entrants must provide excellent protection (details are sparse, but presumably superior to that of the Bradley)
  • Entrants must have a 20% growth capacity
  • Two (2) entrants must be transportable in a C-17

I’m not entirely sure that this is doable. BAE didn’t think so, which is why they didn’t bother to enter anything into this phase. But GDLS seems to think they can do it.

I would have liked to have seen the Puma entered into the EMD to compete with the Griffin, but since its made by a collaboration between Rheinmetall and KMW, there’s little reason for Rheinmetall to enter it when they had their (now disqualified) KF41.

Of course, Puma was a GCV alternative that the GAO looked at, and was recommended over developing the higher-risk GCV prototype vehicles, despite holding fewer dismounts. Two can fit in a C-17 in the stripped-down configuration that is used to get it into an A400m. And the protection is pretty fantastic.

Obvious problems include that it’s very expensive, I have no idea how much growth capacity is in the design right now, the turret would have to be redone to carry the US-Army preferred 50mm XM913 autocannon, it’s expensive, there’s no provision at present for a hard-kill active protection system, the coax gun is still 5.56mm, the MELLS ATGM launcher isn’t done and did I mention it’s expensive? At a minimum, competitors are required to demonstrate an upgrade path to the 50mm gun. Oh, and the US Army would have to be okay with having to transport and install the rest of the armor before they used their air-transported Pumas.

As it is, we’ll see how the program goes. I’m not going to hold my breath.


  1. You may find the Rand GCV paper to be a good read. 

MGL Thinking

Let’s spend a little bit of time thinking about multishot grenade launchers (MGLs) Specifically, I’m thinking about the Milkor M32A1 that SOCOM and the USMC bought recently. I’m on record as liking them, and I stand by that, but I haven’t been able to slot them in anywhere. Let’s fix that.

It’s pretty typical for a fire team to have one grenadier and squads to have one or two. These grenadiers have an M320 or M203 or similar launcher, which may be attached to their carbine or carried in a standalone configuration. I prefer the standalone configuration, since it generally gives a more effective grenade launcher, and reinforces the concept that the grenade launcher should be the primary weapon for the grenadier. It’s also easier to get good sights on the grenade launcher. So let’s try the simple thing. What if we replace the standalone one-shot grenade launcher with the M32A1?

There are some obvious gains we can see immediately. We gain up to five follow-up shots, which make it a lot easier to quickly correct for aim or put more fire on the target. There’s also a well-designed stock, a launcher design that can comfortably handle medium velocity (40x53mm) grenades, a spin drift compensating optical sight, and plenty of picatinny rails for night-fighting accessories and the like. The obvious downside is, of course, weight. The M32A1, equipped with M2A1 sight, weighs 15.8 lbs.

Let’s start playing with some weight numbers. First, we need some sort of benchmark. We’ll look at a current squad member with another weighty weapon: the SAW gunner. An M249 SAW weighs 17 lbs unloaded. The gunner’s basic load of ammo is 1,000 rounds, carried in five 200-round belts. For simplicity, I’ll assume these are all carried in the standard plastic boxes. Each boxed belt weighs about 7 lbs, so the basic load is 35 lbs. Add in the usual sight, the much-maligned Elcan M1451 (1.5 lbs) and we get an all-up weight of 53.5 lbs. That’s pretty heavy, and we almost certainly shouldn’t go heavier than that for our grenadier load.

Some digging around the internet puts the grenadier’s basic load of grenades at 36. Low velocity grenades weigh about half a pound a piece, so that’s 18 lbs of grenade ammo. If we want to carry all medium velocity grenades, which weigh about three quarters of a pound, our ammo load goes up to 27 lbs. Medium velocity grenades have a number of advantages over low velocity grenades. The higher velocity doubles the maximum range from 400 meters to 800 meters. Medium velocity grenades also have a significantly larger maximum point-blank range (i.e. the largest range at which you don’t need to adjust your aim to account for grenade drop). Furthermore, medium velocity grenades have a noticeably larger warhead.

We’re not done though. While the grenadier’s primary weapon is (now) his trusty M32A1 multishot grenade launcher, he needs a secondary weapon. Something for close encounters.2 The old-school traditionalists might call out a pistol, and pistols are pretty compact and lightweight. But they’re also generally not very effective in combat. They’re harder to score hits with and they don’t have as much terminal effect as a carbine. Plus, few soldiers have the practice on one to make it work for them. Can we make the loadout work with a carbine as secondary?

While a basic load for a rifleman is seven magazines, we can reduce this to, say, three or four magazines because the carbine is a backup weapon for the grenadier. An M4A1, Aimpoint Comp M5 red dot sight, and ATPIAL for night fighting comes out to about 7.2 lbs. Three mags come out to 3.2 lbs, four come to 4.3 lbs. So total weight for the carbine secondary is 10.4 lbs with three mags, and 11.5 lbs with four mags.

Just for the record, a Glock 19 Gen5 MOS with Deltapoint Pro and four mags comes to 3.3 lbs or so.

If I go with three mags for the carbine, I can squeeze in under my SAW Gunner weight threshold, even with 36 medium velocity grenades. I’m a bit over with four carbine magazines, and of course going with the pistol option leaves me a reasonable margin. I still prefer the carbine as a secondary weapon because of its greater utility, and because carbine marksmanship is a lot less perishable than pistol marksmanship. Overall though, this seems like a plausible grenadier loadout, and I like it much better than the alternative.


  1. This is very much NOT the sight I would put on my squad LMGs, but this is a standard choice for US Army MG sights, so it’s what we’ll go with here. Remember, we’re only trying to get a ballpark heavy load. 
  2. Read that in a Michael Biehn voice. 

Pegasus-class Fast Attack Hydrofoil

Back in the 70s, the US Navy was serious about a hi-lo mix of surface combatants. The Lo end was going to be filled by the Pegasus-class. These were intended for use in the Mediterranean and Baltic seas, basically a small, near-shore counter to Soviet fast attack craft.

Enter the Pegasus-class. These were small (about 250 ton) hydrofoils. Being hydrofoils, they have wings on struts that lift the hull out of the water at speed, significantly reducing drag. As a result, the Pegasuses could make over 48 knots in calm seas, and over 40 knots in rough seas. Power was an LM2500 gas turbine when foilborne, and a pair of diesels when hullborne. This was fantastic in the 1970s, and is still impressive today.

Armament consisted of the ubiquitous 76mm Oto Melara gun, plus two quad harpoon launchers in the US Navy versions. The proposed versions for the German Navy had a pair of quad Exocet launchers.

Changing priorities saw Italy cancel their order, the US Navy drastically reduce their order, and then the Germans cancel their order. The remaining Pegasuses had a happy and successful life in coastal jobs, including running down drug smugglers.

So what do we think? Speed is fun. I think the concept has merit in the fast attack space, but it would be a pain to deploy without good forward basing. There was also a mothership proposed to assist in deployments but that was also cancelled. Overall though, while tricky to deploy for the US Navy, they’ve got a lot of merit for allies looking for relatively low cost punch.

On the XM913 50mm autocannon

With a public, successful test firing, now is a good time to talk about the XM913 50mm autocannon, a modern application of the 50mm Supershot (sort of). The rounds are the same overall dimensions as the 50mm Supershot rounds, i.e. a straight-walled version of the 35x228mm cartridge. Since it’s building on an existing cartridge, the XM913 is actually a rather boring gun. It’s just a Bushmaster III with a different barrel. Same feed system, same great electrically-driven “chain-gun” design. The Bushmaster design has proven to be very reliable and scalable, since it’s externally-powered action doesn’t have to be recalibrated to function correctly with a different amount of recoil or gas. Rate of fire is also easy to adjust.

The ammunition in question is rather more interesting. While it has the same overall cartridge dimensions as 50mm Supershot, the new case is 100 mm shorter, at 230mm length instead of 330. Where 50mm Supershot was designed to give more KE power for armor penetration, the new rounds are designed to launch a larger volume projectile, for better airburst and guided options. Current design is for a command-guided airburst round for C-RAM and anti-UAV work. And it should still work with the previous rounds, if more armor penetration is desired.

Ammunition is the same base diameter and overall length as 35x228mm, so we’d expect the same ammunition capacity. It’s about half what you can get with 30x173mm, give or take depending on details.

On to what we think. I’ve always liked the notion of 50mm Supershot. I’m pretty skeptical of some sort of command-guided C-RAM munition, but bigger airburst is better airburst. We’ll see how tests shake out.

2019 Self-Propelled Artillery Revisit

Last time on Parvusimperator Picks a Self-Propelled Howitzer for Borgundy, I ended up going with the big, expensive Panzerhaubitze (PzH) 2000. I also eliminated wheeled vehicles out of the gate for concerns about capacity. Since it’s been a while since I’ve talked much about the Queen of Battle, I thought I’d revisit my procurement decision, because that’s loads of fun to write about and tend to be popular with you, dear reader. While available systems have not changed, let’s open the floor up. We will require protection for gunnery crews while firing, to simplify this a little1. So let’s dig in.

First, I’m going to relax my tracked-vs-wheeled constraint. This is artillery. It’s a support vehicle. With the range of modern systems, it’s not critical that the system be a perfect match for tanks and IFVs. Also, trucks should have no trouble getting to wherever a wheeled system is. What is important is 155mm caliber, an L52 gun, and a careful look at how we might plan to use the system. Wheeled systems have advantages in lower maintenance costs, better mobility via roads, and generally better strategic mobility if you care.

Somewhat-recent events in the Donbas reminded us that artillery is a very effective killer, and that a reasonably sophisticated opponent will endeavor to use counterbattery radars to locate and destroy one’s own artillery. So we’re thinking hard about shoot-and-scoot. Let’s get on to some plausible contenders.

As before, we have the German PzH 2000. It’s well protected, tracked, and has an excellent capacity of 60 projectiles plus charges. It has a five round MRSI capability. On the downside, it’s expensive and the heaviest at 56 tonnes. Once its empty, it has to be reloaded in the usual, manual way.

We also have the Korean K9 Thunder. It’s tracked, with a capacity of 48 projectiles plus charges. It has a three round MRSI capability. It also is the only one available with an armored resupply vehicle, the K10. The K9 weighs about 47 tonnes. In its favor are the fact that the South Koreans are buying tons of these, and they have a nice upgrade roadmap. The currently available K9A1 improves the electronics and navigation systems over the previous model, and is the current standard if one was buying today. Samsung Techwin is also working on an A2 version with fully automated shell and propellant handling and a reduced crew. It should also feature an increased rate of fire.

There’s also the Swedish Archer system, which has a low capacity of 21 rounds, but has a very high degree of automation. Like the ill-fated Crusader, it has entirely automated handling of artillery rounds, propellant charge modules, fuse-setting, and primers. As a result, it has a best-available six-round MRSI capability. Weight is somewhere in the middle at 33 tonnes. It was supposed to have a resupply vehicle, but that got axed.

Finally, we have the Boxer RCH, which takes much of the gun from the PzH 2000 and mounts it in a fully automated turret on the back of a Boxer MRAV. It has low manning, but not much is available about it, because no one has bought any. This is one of many mountings of the Artillery Gun Module on various chassis, and the same system has also been mounted on an ASCOD 2 chassis.

We also have Denel’s G6, which saw combat in the border with Angola, and has been kept up to date by the scions of Gerald Bull’s Space Research Corporation. It’s a somewhat large wheeled vehicle, and builds on South African experience in making mine-resistant platforms. Current versions have improved fire control and ammunition handling, and are equipped with an L52 gun that has a chamber with 23L (JBMOU-compliant2) or 25L capacity. These are the G6-52 and G6-52L versions, respectively.

We have contenders. Let’s look at some salient characteristics in a chart. Note reloading rates, instead of time to completely reload. MRSI are the maximum number of rounds possible according to the manufacturer. Bursts are 3 rounds, as fast as I could find the manufacturer claiming they could shoot them.

SystemWeight (tonnes)CapacityMRSIburst (sec)Reload Rate (shells/min)
PzH 20005760595
K9A1 Thunder474831512
FH08 Archer33216202.5
Boxer RCH38.53059?
G6-52(L)46475 (52) or 6 (52L)154.7

On to some commentary. Archer was supposed to be a joint Swedish-Norwegian project, but the Norwegians pulled out. Digging through old defense magazine articles, Norwegian concerns were the low capacity with lack of automated resupply system, issues with too large a dispersion, and too high ground pressure. Archer has seen no export success, and seems to be expensive.

Recently, K9 has been seeing quite a bit of export success in Europe due to its very reasonable cost and favorable licensing terms, which is notably less than that of Panzerhaubitze 2000. It also beat the Mista-S in an Indian tender. Other export users include Norway, Finland, Estonia, Poland, and Turkey.

Despite the higher cost, Panzerhaubitze 2000 has also seen plenty of export success with other NATO members as well as Qatar. It also has an armor kit designed to protect it against DPICM-type submunitions that you might find in a counterbattery rocket artillery salvo, especially if your opponent is Russia.

And the Boxer RCH hasn’t been bought by anyone yet. Rumor has it that it’s the favorite with UK MoD in their upcoming procurement contest. That said, it’s quite heavy for a Boxer variant, and it needs a different engine.

Denel has a long history of working on long range V-LAP rounds, and the G6 can take advantage of this. The G6-52L can use its non-JBMOU chamber to fire the M9703 base-bleed/rocket-assisted EFRB VLAP projectile a distance of 73 km in tests. Which is best in class by far. Otherwise it’s a pretty solid option with good but not great capacity for ammunition.

At this point, I’m strongly considering the G6-52L. At least until we consider some other things. First, Denel’s own (old) marketing materials basically dropped the 25-liter chamber version, focusing on the version that is JBMOU compliant with JBMOU compliant ammunition. The G6-52 itself hasn’t been exported anywhere: Denel’s last export order was the regular G6 to Oman in the late 90s.

Also, all of the present ammunition development work is being done to getting more range out of a JBMOU-compliant gun system. So the range limitation of the other guns isn’t likely to last, and we’re not likely to see more good testing on the -52L version. As a result, I can’t go with it. Regrettably.

We’ve now come back to the choice I had last time, and my answer is the same. I prefer the better fire rate and submunition protection of the PzH 2000. Things to keep an eye on would be an aggressive price move from Samsung, or the rumored K9A2, which is supposed to include fully automated ammunition handling and reduced crew. If that keeps the reasonable stock of ammo, we’d prefer it, especially since it might also improve the rate of fire.

Let’s also take a brief moment to talk about the usual 800 lbs. gorilla in the room: the US Army. Having had a few M109 replacement programs terminated, they’re being quite a bit more conservative this time with a two-stage approach. The first stage, which has just entered production is the M109A7 upgrade, which replaces the M109’s powertrain with that of the M2 Bradley, and upgrades the suspension to handle more weight. Gun upgrades, as well as an automated ammunition loading system, are coming as part of the second stage. The gun is supposed to have an L58 barrel, so it should be pretty fun. For now, there’s not much worth looking at, unless one uses or plans to full-fleet Bradleys. It’ll probably be interesting to look at in the future, however.


  1. So we’re going to ignore for now all of the nifty “towed howitzer replacements” like CAESAR. Those are super simple though, and ought to be mounted to a common truck. 
  2. Joint Ballistic Memorandum of Understanding, an agreement to standardize ammunition and propellant charges for the Next Generation of NATO artillery. 

On 40mm Grenade Launchers

The evolution of western 40mm grenade launchers is a bit of a back-and-forth affair. Initially, we had the M79, which is a single barrel, break-action weapon with its own wooden stock. Sort of an old shotgun given a huge dose of steroids. It was proven super effective in Vietnam, launching a very reasonable amount of high explosives with a minimum of setup. Of course there were drawbacks, especially due to the low rate of fire and limited amount of rounds that could be carried.

The first approach to fix this was called the “China Lake Grenade Launcher.” Taking yet more cues from shotguns, this was a pump-action grenade launcher, with a three-shot magazine for the fat 40mm rounds. Where the M79 weighed about 6 lbs empty and 6.5 lbs loaded, the China Lake launcher weighed 8.2 lbs empty and about 10.2 lbs loaded. Usage was mostly confined to Navy SEALs, who were generally fond of the weapon. The US Army was focused on its SPIW program, which would end up going nowhere. Unfortunately, that meant that the sensible China Lake launcher also went nowhere.

The other approach was the cheap and cheerful M203, an underbarrel launcher that attached to the rifleman’s M16. It’s much lighter at 3 lbs, but has a shorter effective range and makes the rifle a bit awkward to use. Also, the sights aren’t integral with the M203, which leads to more opportunities to lose or screw up a zero. Some standalone launchers were made starting in the 90s, but they never achieved much in the way of widespread use. The original M203 attaches to an M16A1 or M4 by means of a pair of barrel brackets. Some newer variations can be attached to picatinny rails instead.

Replacements to the M203 have been concerned with fixing some of its less than desirable traits, chief among them the inability to use longer ammunition. The US Army’s replacement for the M203, the HK M3201 does this by means of a side-opening action. It also has an integrated grip to facilitate standalone usage, and has integral sights. These don’t have to be rezeroed if the launcher is moved between rifles or attached to the stock kit. However, the M320 is a bit heavier than the M203. The integrated pistol grip and included vertical folding foregrip seem to indicate that the M320 is optimized for standalone use.

The big competitor to the M320 is FN’s EGLM, which had an extension to move the trigger down where it could be fired from the rifle’s regular grip using the middle finger of the rifleman. Extensions are available for both 5.56 magazines and 7.62 NATO magazines. The EGLM can also accommodate longer rounds, but does not have integral sights. Also, like the M320, it has a double action trigger. This is marketed as giving second strike capability, but I really don’t think that’s all that important given that you aren’t using super old grenades.

So let’s get to picking. There are a bunch of other grenade launchers out there that are marketed in packages to go with various other service rifles, but that’s not a big deal to us M4 users in Borgundy. And when I go looking for fancy rounds that you can’t fit in an M203, I mostly get a bunch of “less-than-lethal” options2. Great if you’re the LAPD, but I don’t really see the utility for standard issue to the infantry. The other thing that you can load in the EGLM and the M320 is the Pike missile, which is a pretty cool laser guided mini missile with about 2,000 m of range. However, that’s quite a bit of reach for the regular grenadier in the rifle squad, given that the standard 40mm round has an effective range of about 400 m. Again, it seems kind of a niche weapon. Great for special forces. I’ve also mentioned that I’m not buying the second strike argument as anything anywhere close to necessary. The M79 and M203 don’t have that, and soldiers have been using those effectively in combat since the 1960s. And at the end of the day, the venerable M203, even with the picatinny rail adapter, is going to be way cheaper than the competition.

So we’ll go with the M203A2 (or equivalent; the M203 is a widely licensed system), which has the picatinny rail attachments. We’d want to purchase the stock kits to go with these as well, since we’d expect3 these to be used more often in the standalone configuration as long as we can keep that configuration reasonably compact and light.

We should also talk about the the Milkor MGL (M32 in US Service), which is sort of like a successor to the China Lake Launcher idea, albeit from South Africa. It has a six-round, revolver-style magazine. Clearly, it’s trading weight for capacity. An M203 in standalone configuration weighs a bit less than 5 lbs unloaded, depending on options.4 The six-shot M32 weighs 15.4 lbs unloaded. And that revolver magazine makes for a pretty bulky gun. Anyway, I’m kind of skeptical of the M32, given that the grenadier is still likely to have to carry a carbine in addition to it. At least the rounds it fires actually work, unlike the XM25. I think it would be reasonable to procure some M32s, but I’m not really sure where to put them in the TO&E. Probably in the back of a vehicle somewhere.

And there you have it. Cheap and cheerful launchers for cheap and cheerful grenades. In terms of basis of issue, I think two per squad is a pretty reasonable choice.


  1. Under no circumstances should this be confused with the SIG P320 pistol, which is known in US Army service as the M17 pistol. 
  2. People also talk about medium velocity grenades, but I can’t seem to find anybody actually issuing any. Even the US Army. 
  3. I don’t have a ton of M203 experience either way, but the consensus at Primary & Secondary amongst those who have used them is that standalone grenade launchers are better. 
  4. LMT’s L2B weighs 4.7 lbs in standalone configuration. We can go lighter if we get their L2X with a 7″ barrel and its compact stock kit, which at 3.6 lbs all up is the lightest launcher I can find. 

On Light Machine Guns

The US Army has decided that they might could replace the M249 with something. Possibly. Or maybe it’s just Lucy Van Pelt with her football. Anyway, the US Army claims it wants “Overmatch”. Or something.

Overmatch

The fear is, of course, Russians (or Chinese or whoever) with level IV-equivalent body armor. Let’s think about this for a minute. Level IV hard plates are rated to stop the .30-06 M2 AP round, which is a pretty darn good steel-core AP round. And no existing round short of .50 BMG is significantly better at penetrating armor than .30-06 M2 AP; it’s actually better at penetration than both Russian 7.62x54mmR B-32 API and 7.62x51mm M61. I’m not sure how a new 6.8 mm cased telescoped round is supposed to be massively better at armor penetration than .30-06 M2 AP, unless it’s supposed to use a tungsten core. Tungsten becomes problematic once you look at the cost and where most of the world’s tungsten is mined.

It could also be some sort of Magnum 6.8mm CT round with tons of velocity, but then managing recoil becomes a huge problem. After all, steel core .30-06 is not enough, so we need more energy. More energy means more recoil, because physics is a real jerk sometimes.

Let’s also recall my usual criticisms of some sort of radically new and unproven small arms technology, which is exactly polymer-cased telescoped ammo is. We’re talking about completely new ammunition manufacturing techniques, completely new cartridges, plus massive changes in how a firearm operates. We’ll let the US Army put up and prove the stuff or shut up. Come back and talk to us in five to seven years, and then we’ll know if it’s more than the next SPIW.

Okay, so that should deal with all the WONDERCALIBER advocates. Don’t trust Big Army to buy crazy new stuff. Wait for ambitious programs to come to a conclusion. Don’t be a beta tester. Wait for bugs to get worked out. And there will be bugs.

If we’re sticking with conventional calibers and known solutions, that makes our lives a lot easier. Let’s take a brief look at squads to see how we might use the LMG. I’ve been on record before that I don’t think squad size matters too much, and I still don’t. Picking the Namer as our (Heavy) IFV of choice lets me have a nice big dismount element of nine, which makes life easy. Nine men is a pretty classical dismounted infantry squad size. Squad leader, two fireteams of four men, and one LMG per fireteam. Two LMGs in the squad is a lot of firepower, and lets either team cover the other for fire and movement if desired.

Had we gone with a smaller, more conventional IFV with a dismount team of six or seven men, I would have copied the Australians and gone with two fireteams of three men each (plus a leader in the seven-man case) and kept the two LMGs per squad. Again, fire and movement. Also, it allows for better implementation of parapet foxholes.

And now, a brief word on command. In general we’d expect the IFV commander to be in overall command, and to remain in the vehicle when the troops get out. The vehicle commander would be senior to the dismount commander.

There is the pressing matter of caliber, configuration (i.e. mag fed or belt fed), and model. Let’s take those in order. Caliber is pretty easy. It should be our usual 5.56mm to maximize bullets per pound of loadout and (therefore) volume of fire capability. It’s also a lot easier to carry, since most GPMGs aren’t workable with a single gunner (i.e. without an assistant gunner).1

And we’re going belt-fed, because we want that big ammo reserve for suppression and sustained rates of fire. Large capacity drums are bulky, heavy, annoying, and generally unreliable. They also usually have to be stowed when empty. Screw that. Belts it is, by God and John Rambo!

Belt-fed 5.56mm light machine guns. They’re super fun to shoot. We just have to pick one. For the most part, they’re all pretty similar. The one that stands out weight-wise is Knight’s LAMG, which is significantly lighter than all the rest. Which should make it a slam dunk, except that no one else has bought them. And such a massive weight savings has me nervous, since there’s no such thing as a free lunch. I have some concerns about durability, and since no one has issued them on a wide scale, no one has worked the bugs out. Again, we don’t do beta tests. So we’ll pass too. Which basically leaves a whole bunch of equivalents in FN’s Minimi/M249, HK’s MG4, IWI’s Negev, and some others that I’m forgetting. They’re all pretty much the same, and I don’t think you can go wrong. Of course, this also means that there’s not much of a reason to switch, unless you wanted to beef up your local firearms industry. Since I hate wishy-washy conclusions, I’ll go with the proven M249, mostly because it’s the only one I have any time on. It’s also been licensed to a number of other countries.

I’m sure the Wondercaliber advocates are going to ask about body armor. Well, okay. Fine. Shoot them more. It’s a belt fed. Ceramic plates are only good for a few hits. Even the multihit rated ones. You have 200 rounds in the belt. Use ’em. Also, the real killer is and always has been high explosives. 40mm grenade launchers, rocket launchers, recoilless rifles, mortars, and especially artillery. More on that in a few days.


  1. I think this might be a change from the last time I wrote on squad support weapons. It happens. 

On Split Squads

One of the things that has always confused me is why the US Army mechanized infantry platoon features split squads. It features four Bradleys and dismounts organized into three squads of nine men each. Since each Bradley holds six or seven dismounts, this means squads have to be split to be reconstituted later. While this matches light infantry practice, it always stuck me as needlessly complicated.

It wasn’t always this way. Originally, the Bradley and its six dismounts were considered as a “squad”, with the Bradley acting as a big, tracked, fire support unit. There were problems with the execution. The first was the question of squad leader. There is always the question of whether or not the squad leader should lead the dismount team or act as vehicle commander. The US Army said, BOTH! As a result, the Bradley commander would dismount along with everyone in the back. But this would lead to a suboptimal arrangement with the gunner having to perform double duty as the vehicle commander. So one of the dismount members would be cross-trained as vehicle commander, and he would climb up and take the place of the Squad Leader as vehicle commander.

That’s needlessly complicated, and for once the Army agreed. They decided that while they were in there revising the platoon org chart, they would work for more homogeneity. The Bradley Platoon of four Bradleys got rethought into two pairs. This mirrored U.S. Army thinking in the tank platoon, where four tanks were thought of as operating as two pairs of tanks. Each Bradley pair would get a squad of nine men to account for. Given that early Bradleys had six seats for dismounts, the Army split them into a fireteam of four per Bradley, and one of the two Bradleys in each pair got a (dismount) squad leader. Now, Bradley vehicle commanders could be just vehicle commanders, dismount squad leaders could be just dismount squad leaders, a dismounted squad could perform fire and maneuver on its own, and the dismounted squad was identical to the light infantry squad. The US Army has tended to like the idea that each infantry squad can be capable of fire and maneuver by itself. This also left six empty seats per platoon, which was sufficient for the platoon commander, XO, and any attached extras like radiotelephone operator or medic.

The next step to get us to today happened with revisions to the Bradley itself. A desire for more protection and the realization that the firing ports were useless led to them being plated over as part of the changes for the M2A2 version. Since the troops no longer needed to shoot out of gunports, the seats could be rearranged into more conventional benches along the sides of the vehicle, and the designers were able to squeeze in one more dismount, for a capacity of seven. Applying these to the previous organization chart meant that there were now ten empty seats, or room enough for another squad. This brings us to the platoon of four Bradleys and three dismount squads of nine men each that we know today. The careful reader will note that there is now no longer space for much of a command group or attached extras, but that’s something that the Army has not been bothered by.

Personally, I don’t like it. I’d much prefer to take the original concept of six (or seven) man dismount element and Bradley fighting vehicle as the squad, and skip the place-switching. That’s a lot simpler, removes the requirement of fireteams to “form up” to become squads, and would still allow for a bit of fire and maneuver on its own if we relax the desire to always have four-man fireteams. Australia is going exactly this way in their latest reorganization. I would also point out that while homogeneity is nice, different sorts of units have tended towards different organizations. No one is trying to organize a heavy weapons squad or platoon like the regular rifle squad or platoon over in light infantry-land.