M&P series gritty trigger FIX

[Gannicus]

It seems there are many here complaining about the grit feel in their trigger. Allow me to share what I did to cure this problem on my M&Ps. No need to go the Apex Tactical route especially if you'd like to keep the gun factory stock for whatever reason. It's such a simple fix that you'll wonder why more people haven't figured this out as it should be common knowledge at this point.

All you need to do is file and or sand the rear portions of the trigger bar where it contacts and rubs against the striker block and slightly round out the angles. You'll want to remove some material...just enough to shave away the horizontal tool marks that causes your trigger to feel "gritty". No need to polish, though, you can if you want.

I did this to both my M&P 40s and they are now they are smooth as butter. Hope this helps.

[Varg Vikernes]

Some people don't want to mess with sanding or filing factory parts when you could just drop in aftermarket parts.

[Gannicus]

Dude, it's so easy a monkey with arthritis can do it.

['ol shooter]

Thanks for the post. I like to tinker, may give this a shot.

[afteractionreport]

I will try thanks

[9mmepiphany]

If you're going to DIY anyway, you'd get better results polishing and recontouring the striker block than the trigger bar.

I went the Apex route for the recontoured striker block and cleaned up the trigger bar

[Gannicus]

^ I plan on doing just that. More specifically for better reset and hopefully to eliminate the false reset.

This thread was the help those who are only wanting to rid their guns of the gritty trigger without spending money. Besides, re-contouring the striker block is much more work for the same result. You don't even have to take the trigger bar out. I didn't. I just carefully filed away.

[FresnoRob]

Dude, it's so easy a monkey with arthritis can do it.

Can anyone rent me " a monkey with arthritis " ?

Been meaning to look at doing this too but I'm a lazy tard.

[Gannicus]

^I edited my earlier post. But again, you don't have to disassemble anything. Just take the slide off and start filing/sanding away. Just be careful not to scratch the frame or any other parts. A small fine file works best. It took me all of 5 minutes. And remember to file up and down or forward and back as opposed to side to side unless you plan on polishing.

[timmyb21]

I did the cut and polish on the sear as well, polished up all the contact points, and got a nice smooth trigger that breaks at just above 5 pounds. Works awesome.

[Capt1776]

With all of the complaints and since this is such an easy fix, you'd think S&W would do this at the factory.

[mdib870]

Get rid of the magazine disconnect and polish the trigger and sear parts. Good to go!

[SloChicken]

I did the cut and polish on the sear as well, polished up all the contact points, and got a nice smooth trigger that breaks at just above 5 pounds. Works awesome.

I just finished reshaping (file, stone, and polish) the sear for overtravel (I did not cut the sear to reduce trigger pull here), polished the trigger bar, polished the striker and reshaped the firing pin block (here is where I reduced trigger weight).

I had been having problems with this trigger for a while and decided to find out what was up before I bucked up for the Apex kit.

I must say the trigger is so much better now, more positive release, and no grit. Overtravel is much less as well.

I may still get the forward set sear and a decent metal trigger so the trigger pull is not so long before release.

All in all, the job took about hours and 2 beers.

Pretty darned happy with the results. I would highly suggest doing this.

BTW, I found a bent spring under my rear sight when I pulled it to take out the firing pin block. I think that may have been the problem that was causing my pistols original problem of failing to release the strikerr (fire) on occasion.
it took a bit of redneck injunerin' to get the spring straightened and back in properly but once it was done, the pistol was better than new (due to an inattentive monkey at S&W ...

[SloChicken]

^ I plan on doing just that. More specifically for better reset and hopefully to eliminate the false reset.

This thread was the help those who are only wanting to rid their guns of the gritty trigger without spending money. Besides, re-contouring the striker block is much more work for the same result. You don't even have to take the trigger bar out. I didn't. I just carefully filed away.

Actually, re-contouring the firing pin block (Striker block) is another, relatively easy to do refinement that will make a bigger difference than shining up the trigger bar.
The sharp angles on the face of the firing pin block are partially where the grittiness comes from.
Eliminating each of these problem areas will only make it better.

I reshaped my firing pin block in a matter of about 20 file strokes, about 2-3 minutes finish shaping with a stone, and about 2 minutes on a polishing wheel (dremel in a vice) with some rubbing compound.

You do have to remove your rear sight and fight a bit at reassembly with a spring under the firing pin block that is too small and mal-positioned for ease of install (engineer's joke I imagine).
but really, it is not too bad and makes worlds of difference.

[9mmepiphany]

With all of the complaints and since this is such an easy fix, you'd think S&W would do this at the factory.

The trigger bar is just a stamped and formed piece. If they had to take each one and polish it by hand, it would raise the cost quite a bit...not so much the time to do it, but the slowdown in assembly rate