Anyone undercut their trigger guard? What did you learn? I got a bad case of Glock knuckle last week and want to shave some off. Also thinking about the 25¢ trigger job. Was pondering using files to knock off the burrs or maybe just Q tips and polish. Any suggestions? Any pics?


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Thanks, but that is only half the question. You also didn't say exactly how you did it.

For the trigger guard I used round files (for sharpening chainsaws and another finer) and some finer curved modeling files. You can finish up with sand paper of various decreasing grits. (I stopped at 400)
That ridge that runs down the center line of the TG is now gone, too! (the line looks like the frame was originally two pieces/halves)

I didn't polish the trigger.

Dremel with round sandpaper bit and wet/dry sandpaper for final smoothing. Carefully.
Used tape to mask off areas that I didn't want to cut (at first) and adjusted as I went along.
Also smoothed down the stupid serrations on the front of the trigger guard along with rounding the bottom front 90 degree corner.
Can't explain any better than that, had an idea of what I wanted and just started the dremel and got to work.

Didn't do anything to the factory trigger except throw it into the Glock box; replaced with an aftermarket flat trigger.

And after all that, it still was as bad as I remember from the last time I bought a POS Glock (1985), so I sold it and bought a Walther PPQ, which is light-years better than a Glock.
Shame on me for thinking that after 5 generations they would have improved it.

the dremel probaly works great, but be careful: it will/can remove material fast.

For what it's worth, I undercut the trigger guard to fit it to the curve of my proximal phalanges of my middle finger. Feels great.

Here's one that someone else started and I cleaned up and smoothed. I like to use sanding drums (either for a dremel or die grinder) but mounted in a drill press for better stability. Those are used to cut the initial shape, and then I smooth the cuts by hand with finer sandpaper. Sanding wet works best, WD40 actually works really well for this, just don't leave it really wet inside the gun.
If you want to put a shine on the cuts, a soft buffing wheel in a dremel works, but use a very gentle touch and don't dwell in one spot too long.



This one is not a very good picture of the undercut, but it does show how high you can go compared to stock. Ignore the cartridge and velocity reading, I was doing some experimenting...

I did mine with a dremel. Lots of videos out there too.

As for the 25cent trigger job, I just used Q-Tips as the dremel would over-polish what you're trying to accomplish. Literally takes less than 5 minutes to do the connector/trigger bar.

thanks