Apex FSS trigger in M&P safety doesn't work... help

[1KPerDay]

Finally got the trigger installed after much swearing. The safety lever doesn't pop out... the trigger can't move forward enough to allow it to extend. If I press hard forward on the trigger it will, but then of course the trigger pull is very heavy and then upon reset (the sear resets) the safety doesn't extend. Obviously this is an issue.

I'm hoping someone here has experience with this problem and knows what Apex recommends... stoning the front/pre-travel edge of the trigger, or removing a slight amount of material from the rear top edge of the trigger guard where the safety engages, or something else I haven't considered.

Thanks!

 

[1KPerDay]

Apparently this is not uncommon... Apex advises to modify the frame (according to this thread).

http://mp-pistol.com/mp-gunsmithing/37954-apex-fss-trigger-safety.html

Here's the relevant bit:

I actually had the same problem, this is what Randy Lee sent me in an email:

The new trigger safeties seem a little longer and tow out more due to some frame variances we have seen lately. I would recommend removing a few thousandths from the trigger mortise in the frame (the front of the trigger limits take up as it rests against the front inside cut of the frame (if you remove the trigger and locking block, and look down you will see the rectangular cutout for the trigger). Use a small needle file or emery board to remove any excess flashing that can form when they mold the frame. This will allow the trigger to pivot forward and let the trigger safety move forward enough so that it snaps back into the blocking position.

A few strokes of a needle file is all that was needed to make the safety function perfectly.

Here's a vid of my problem.

Apex M&P FSS Trigger safety problem - YouTube

 

[1KPerDay]

well I got it installed and running but it was a huge pain in the butt . Trigger feels great though. Cut pre-travel from 7/16" to 1/8", and total travel from 9/16" to 3/16" (approximately). I had to remove a small amount of plastic from the front edge of the trigger guard opening to allow the trigger safety to reset. just a few swipes with a diamond file took care of it. the worst part was installing the trigger spring 6 or 8 times. even with a slave pin it was very difficult on mine.
trigger pull weight was cut from about five and a half pounds to about four and three quarter pounds. I may try the OEM trigger spring to bring it down a little bit more .... after I work up the courage to reinstall the trigger spring again.

 

[1KPerDay]

Put a couple hundred rounds through it tonight getting it sighted back in and getting a feel for the trigger.... it is like a different gun. the stock trigger I had to basically shoot it like a revolver and come all the way off the trigger during rapid fire. Now I find myself coming way forward off the trigger face for no reason. The reset is much better (I installed the RAM also) and the total travel is messing with me. By the end of the session I was back up to speed a bit.

I like it quite a bit. Thinking about having it quad ported now... dunno how much difference it will make with standard loads.

 

[1KPerDay]

Quick video of trigger pre-travel, total travel, and pull weight before and after Apex FSS installation. Includes shooting evaluation. Includes "Join the discussion at http://www.thehighroad.org/" in video info FYI.

http://youtu.be/9PWeJa9WMWQ

For full installation video check my other videos if interested. It's long and frustrating.

 

[taliv]

cool, thanks for posting