Save your money & the headache, go with polymer!!! - Apex Tactical Specialties 100153 Flat Faced Forward Set Sear & Trigger Kit S&W

Trigger itself is a huge enhancement most definitely and worth the money. If you receive a proper trigger mechanism and you handle such with great care and use down the road. Aside from that, in my opinion it does not hold up well. Let alone installation is a pain in the you know what. This is my fourth trigger from Apex. All have been outstanding and wouldn’t use anything else in all of my S&W M&P’s. But this one with the aluminum by far was the worst experience I’ve had from them yet. Release pin for the trigger wouldn’t give when trying to punch it in. Nearly cracked the trigger trying to apply pressure ended up throwing it in the trash. $200 thrown down the toilet. Lesson learned though.