Originally Posted by Fastbolt

In my last armorer recert they told us that the "new" standard "trigger" consists of the Performance Center sear, a new slide stop assembly and a revision to the trigger bar.

The PC sear would seem an obvious refinement.

The revised slide stop assembly ought to help with the "tactile reset" due to it adding some additional pressure against the trigger bar, pushing it inward (left) with a bit more tension. This has been accomplished via adding an inward bend/angle to the bottom rear corner of the right side of the slide stop assembly. Nifty idea, accomplishing their goal (and answering customer demand) of making the trigger bar snap under the sear nose during sear reset a bit more briskly ... and they didn't have to add more parts to do it. Nice.

The new slide stop assembly also incorporates the yellow (painted) wire spring, which is heavier than the previous springs they've used on the slide stop lever assemblies.

The change to the trigger bar wasn't described in detail, except to say they made a modification to it so the addition of the PC sear didn't drop the trigger pull weight below what the original trigger pull weight was intended to be (since the standard M&P is designed to be a service-type trigger, after all).

Last I heard the "new triggers" were being introduced into the 9/.40/.357 guns sometime late last year, but we were told that due to ongoing testing of the .45 trigger bar's revision, the .45's won't be receiving all of the revision until maybe the end of this year.