I've had a Apex FSS installed on my m&p 40 pro, with a 5in barrel. Joe with crusader arms did it for me. I thought about doing it myself, until I watched the apex instrutional video. He uses a demo gun, and the person doing the install has done it many times before. And the video is still full of comments like, "the rear sight can be very difficult to remove, not on this gun though." And the neat video edits, where you can see him start to struggle with something, then, blip, it's done! Ha! So, I opted out.
The kit contains a rear sight tool, replacement springs, the new trigger, and sear. The stock mp trigger saftey is a joke. The entire lower 3/4 of the trigger is jointed, as part of the saftey. That doesn't provide anymore safty then a nonjointed safteyless trigger. The apex trigger is aluminum, and has a glock style trigger saftey. I'm not big on external safties, but this one at least does it's job. And I can't see it interfering much in a tense SD situation.
The trigger pull is compared to a 1911's. I disagree, it is more like a savage accupull trigger, set to 4 pounds. It is amazing. I love it. The reset is very weak, but the entire travel is about 1/8 of an inch. So I over release the trigger all the time anyway. I need to practice that.
I've put 250 rounds of 40s&w, and about 800 of 9mm through it now, using the stock barrel, and a KKM 40-9mm conversion barrel. Not a single hiccup. I love it. I am using it as my EDC now. Apex does have a warning up on their website, saying the trigger is for compition use only. Reading on the m&p forum, and seeing a rep. of Apex answering their questions, it becomes clear this warning is to cover their hindends in case a anti-gun lawyer comes after it. Not because it is unsafe, or anymore dangerous then a unmodded handgun. "Keep the boger hook off the bang switch." I've got that down, and feel safe with it. The stated pull weight is 4.5 pounds. Joe with crusader and I both think that's about right.
All in all, it cost more money then I would like, but it feels amazing, and has worked flawlessly. I'd recommend it.
Springfield 1911 black loaded target. 460 Rowland.
M&P 40 Pro.
To be voluntarily disarmed is to rely on the honor of the dishonorable.