Zev Fulcrum Trigger Kit Adjustment Help: VIDEO INSIDE

[ducatiti]

So I installed everything in the Fulcrum Trigger Kit, without the skeletonized striker. I used the 3lb firing pin spring instead of the 2lb to avoid light strikes.

I know that trigger feel is mostly personal preference but provided the video below, would you adjust the pre-travel? Still a bit excessive for my taste but would like to get your opinions prior to tinkering with the adjustment screw.

Thank you in advance.

https://youtu.be/YxlV6FM7MVU

[ducatiti]

To add, this particular firearm will only be used as a range toy and I opted to use the Zev Race Connector included in the kit. This makes the trigger action very smooth eliminating minor flinch or jerk even upon dry firing with one hand.

[BarrettM99]

I wouldn’t mess with the travel. It’s set pretty good from the factory.

[Josh3239]

The pre-travel looks pretty good overall. You could shorten it a tad, but I would strongly recommend doing it in very short increments as you don't want to "adjust away" the trigger safety. Bear in mind some take-up is necessary in a safe Glock trigger as the rearward movement of the trigger bar begins turning off the passive safeties.

[ducatiti]

Thanks for your suggestion Josh3239. I went ahead and proceeded with the small adjustment for the pre-travel. Lighter, included Allen wrench, and blue locktite. I did 1/4 turn increments at a time, to a total of 3/4 turn to achieve the trigger I am satisfied with. I made sure that there is enough space between the red safety and frame.

Hopefully this would help others who may want to do this..


BEFORE:



AFTER:

[AFTII]

Have you checked to see if the drop safety still works?

[ducatiti]

Have you checked to see if the drop safety still works?

I've seen that video last night and read on the comments below. If you look at 2:01, the guy was holding the trigger bar, thus not dropping the cruciform.

Upon quick inspection last night, the cruciform was still on the safety ledge with the trigger moved forward.

Any other way to check this other than dropping the pistol?

[shafferds]

DrOP the pistol on carpet and see if it comes off the striker block and fires.

[ducatiti]

DrOP the pistol on carpet and see if it comes off the striker block and fires.

Ok will do. Dumb question but with the red safety on my fulcrum trigger functioning fine, is it possible for the pistol to fire considering the trigger won't be pulled when dropped and the safety pin functional?

[Josh3239]

In short, no it cannot. The Glock trigger safety prohibits rearward movement of the trigger bar. Rearward movement of the trigger bar means the drop safety and firing pin block safety get turned off.

Now in a world with adjustable everything, it is possible the trigger could be adjusted so that pre-travel is taken up to the point in which the drop safety could be compromised. That is easy to check. Remove the slide from the frame, note from the left side of the exposed ejector housing where the leg of the trigger bar cruciform is on the drop safety, physically check by pushing and holding the trigger bar to it's forward most position and push down on the cruciform of the trigger bar. If the bar falls the drop safety is compromised. If you can see empty space between the rear of the trigger and frame wall, you will likely not experience this. Even if the drop safety was compromised in this respect, that doesn't mean it would fire necessarily, unless the firing pin safety is compromised too than the striker cannot strike the primer. Again this only exists if the pre-travel is taken down to the point where the trigger bar is set resting at a point in which all safeties are compromised.

[ducatiti]

In short, no it cannot. The Glock trigger safety prohibits rearward movement of the trigger bar. Rearward movement of the trigger bar means the drop safety and firing pin block safety get turned off.

Now in a world with adjustable everything, it is possible the trigger could be adjusted so that pre-travel is taken up to the point in which the drop safety could be compromised. That is easy to check. Remove the slide from the frame, note from the left side of the exposed ejector housing where the leg of the trigger bar cruciform is on the drop safety, physically check by pushing and holding the trigger bar to it's forward most position and push down on the cruciform of the trigger bar. If the bar falls the drop safety is compromised. If you can see empty space between the rear of the trigger and frame wall, you will likely not experience this. Even if the drop safety was compromised in this respect, that doesn't mean it would fire necessarily, unless the firing pin safety is compromised too than the striker cannot strike the primer. Again this only exists if the pre-travel is taken down to the point where the trigger bar is set resting at a point in which all safeties are compromised.

Thanks for the informative post. I did that check with the cruciform being pushed down but I wasn't holding the trigger bar forward. I will check again tomorrow.

From my video posted above showing the pre-travel, does it look like the pin safety has been compromised?

[Josh3239]

If you don't hold the trigger bar in the forward position, when you push down the cruciform the trigger bar will move rearward. Keep in mind that is effectively what the slide is doing to the bar when on the frame at rest, it is pushing the bar forward.

If you trigger safety is engaging, I would seriously doubt the firing pin safety is compromised. You could test it, but I don't think it is a useful exercise.

If you wanted to here is a way, but work slowly and carefully so you don't lose anything. Effectively what we are going to try to do is with the trigger in the forward "resting position" we are going to physically push the striker to see if it penetrates the breechface. It shouldn't as the trigger bar shouldn't be back far enough for the bar to deactivate the firing pin safety. Here we go:
1) Remove the slide from the frame
2) Remove the barrel and guide rod assembly.
3) Remove the backplate very carefully as the striker assembly and extractor rod assembly are effectively spring loaded.
4) Place the slide back onto the frame and pull the slide to the rear to reset the trigger.
5) Gently return the slide fully forward. The striker's lug will catch the trigger bar's cruciform and without the endplate it could dump the striker assembly so work slowly, use a thumb with light pressure to catch the striker assembly. If done right the striker assembly will be slightly protruding out the back of the slide (when you remove your thumb).
6) The way I do this is hold the front of the slide and frame together in my left hand tightly so the slide cannot move. With my right hand grab a punch or an allen wrench and push it through the striker space sleeve into the back of the striker and push. While doing this watch the breechface.
7) Because the trigger bar is forward, the striker should not be able to penetrate the breechface by way of the firing pin safety. If it does penetrate, we have a problem, there are a few reasons this could happen and over adjusted trigger is one possibility.