Glock Trigger Pull Mods

I have an awesome and heavily customized Glock 19. It’s awesome. And it would get even awesomer if I had an improved trigger. One of the things I noticed at the high level pistol class I took was that I was the only one running a stock Glock trigger. There were lots of tuned Glock and tuned M&P triggers, plus a PPQ (which has a great stock trigger, something like a tuned Glock). So let’s play around a bit.

First, let’s talk what the trigger pull actually has to do. When you pull the trigger, you finish cocking the striker (at rest, it’s partially cocked). This is done by pulling against the striker spring, of course. Your pull is assisted by the trigger spring, which provides some extra pulling force to help you.1 The path of the sear is controlled by a little bit of bent metal called the connector. At the appropriate time, the connector guides the sear down, the striker is released, and a bullet comes flying out of the muzzle.

Second, let’s talk safeties. Actual, mechanical safeties. The Glock has three things that perform safety functions. First, is the little lever in the trigger. You have to depress this for the trigger to move. And there’s a certain amount of minimum forward travel the trigger has to go through to let the little lever redeploy. Second is the firing pin block. It’s a plunger. When you pull the trigger, a vertical tab on the trigger bar pushes the plunger out of the way. The rest of the time, the plunger will prevent the firing pin from going forward. Finally, the cruciform tab (it’s horizontal) on the trigger bar sits in a slot in the fire control housing. It has to move backwards far enough for the slot to widen. At rest, the narrow part of the slot prevents the trigger bar from dropping away and releasing the sear if the pistol is dropped.

I am not willing to compromise any of these safeties for obvious reasons. Note also that this means there’s a certain required amount of trigger travel before the break if we do not want to disable the safeties. A Glock is not a 1911, and it’s not possible to get an actually 1911-like trigger out of a Glock. Not possible. Well, not without being dumb. We can reduce some of this travel if we’re careful.

There are other things we can do as well. We can reduce the weight of the striker spring. The risk here is that the striker spring is what’s driving the striker into the primer. Too little force means the primer will fail to fire. That’s bad.

We can reduce the weight of the spring holding the safety plunger down. This makes it easier to push out of the way. We’re no longer holding it in place as firmly though.

We can also increase the assistance provided by the trigger spring. Too much and the gun may have issues resetting.

Trivially, we can change the trigger bar from the current ‘Gen4’ design to the older ‘Gen3’ design. This removes a nub which can rub on the frame and add drag to the pull. The nub was added to deal with issues if you reverse the magazine release. Fortunately, I’m right handed.

Finally we can mess with the trigger ‘shoe’ itself, to change the feel, and maybe remove some pretravel and overtravel.

Glocks are very plug and play. No fitting should be needed with most parts out there. It’s very easy to spend a fortune on trigger kits. We’re going to try to avoid that. If you’d prefer not to mess around with parts yourself, go check out DK Custom Triggers. You won’t regret it.

Anyway, you’ll need a punch to disassemble your Glock. If you’re a little rusty on the details, plenty of youtube videos exist to help. Let’s review what I tried. A lot of the following will be a very mix and match sort of nature. That is to be expected. I am not you. I may like different things than you. I may have different preferences as to trigger pull weight than you. That’s ok. Most of these parts are pretty cheap.

To start, I bought a Glock 17 type smooth-face trigger on a Gen 3 bar. Glock makes two kinds of trigger shoes, one with ridges for more Gun Control Act of 1968 points on the import system and one without. The one with is used on smaller guns. I’m not a fan of the feel of the ridged trigger shoe. So this change felt better, and made it a little less likely to pull in a not-straight back direction, but didn’t do much for trigger pull. Well, it took out some of the grit from that nub.

Part set two is the TTI Grandmaster trigger kit. Yes, I know this will not make me a GM-class shooter (alas, I’m not one already). But it comes with a lot of neat parts at a great price. It’s got an increased power trigger spring, a reduced power striker spring, a reduced power plunger spring, and the TTI connector. Score. Price is pretty good too. It uses all stock parts. I found that the connector and plunger spring smoothed out the pull. I’ll have to experiment to see if I get any light strikes with a reduced power striker spring. It made some improvement to the weight though. Definitely noticeable.

I also found that with the 3rd gen trigger bar and the increased power trigger spring on my Glock, that if I let the slide go home gently, the trigger wouldn’t reset all the way. I probably should take a look at it and see if it’s hanging up on something there. But I decided not to bother. I was happy enough with the pull with the standard trigger spring, and I had one more part on the way.

That part was the Overwatch Precision Tac Trigger. It’s the most expensive part, being a machined aluminum trigger shoe. Now I can experiment with a flat-face trigger design. I probably wouldn’t have bought it had I not played around with a buddy’s flat face Glock trigger at a class. On the other hand, it’s pretty easy to resell if you end up not liking it. I chose the Overwatch flat face trigger because they’re recommended by more of my friends who like flat face triggers than any other brand. They also have a bunch of great videos to demonstrate that even though they remove some pretravel by playing with the geometry of how the trigger shoe interfaces with the trigger bar, they don’t disable any of the safeties.

Fittingly, the Tac Trigger also made the biggest difference in pull. Way shorter, with less of a perceptible trigger wall. I immediately noticed in dryfire that I could get on the trigger hard and fast with a lot less perceptible movement of the red dot. The flat trigger and reduced overtravel really made it hard to not pull the trigger straight back to the rear. I varied finger position. I tried to pour on the speed. Didn’t matter. I like this trigger a lot.

Pulling the trigger slowly, I found the lighter feel of the wall to be nice. Again, it’s easier to keep the sights on target. But the creep in the trigger is more readily apparent. Is it creepier than a stock Glock trigger? I think so. I think some mush has been added to the ‘wall’ that also makes it lighter. That said, both Fishbreath and I agree that this is a big improvement over stock, creep or no.

Let’s make another comparison: to the Walther PPQ. Which has a phenomenal stock trigger, and some complicated internals to make that happen. Is this as good as a PPQ? No. The PPQ has a really clever internal system to get the trigger characteristics, plus a fully cocked striker at rest. The Glock has a partially cocked striker at rest. Pulled slowly, the PPQ trigger is longer, and has less creep to it. This is still a good trigger though, and I’d give it the nod if you’re looking to improve your Glock trigger.

Interestingly, I tried swapping back to the dot connector. This made the wall a lot more noticeable again, but it also got rid of a bunch of creep, and masked most of what was left with the wall. I decided I preferred the more ‘rolling’ break of the TTI minus connector, so I stuck with that. I think the minus connector always makes the break more of a roll with some creep, and the Overwatch Trigger just makes this more obvious.

So let’s review. Things that made a big change in my trigger pull, and might be worth tinkering with: connector, striker spring, and trigger shoe. I didn’t think the rest of the parts provided that big a difference. Clearly, if you swapped to a NY1/NY2 trigger return spring, that would change stuff. I do know several guys, including one of my instructors, who like the feel of an NY1 spring and a minus connector. Also, note that if you use a reduced power striker spring, test your ammo with it and consider a lightened striker, especially if you shoot Wolf ammo.

Oh, one more thing. You’ll notice that I haven’t provided any trigger pull measurements. Most of that is from not having an NRA weight set with which to measure trigger pull. But also I think too much emphasis is placed on poundage and not enough on the less tangible things like distance and creep and abruptness of wall. And also what you feel comfortable with. Everyone’s different in that regard. Also, note that Glocks aren’t the most tightly toleranced of pistols.

  1. Unless you have an NY1 or NY2 trigger spring, which fight your trigger press rather than help it to meet NYPD pull weight mandates. 

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