Why change the trigger mechanism? It's a personal choice.
As an NRA Certified Advanced Pistol Instructor and Training Counselor, my preferred firearm is the M&P 9c or 40c. I also have a M&P Shield 9mm. All three of them have had Apex DCAEK (Duty Carry Action Enhancement Kit) replacements. I did this for several reasons.
The trigger pull felt "gritty", not smooth. Also, it seemed that the compacts had a "false reset" prior to the actual reset, which wasn't easily felt or heard. There was a slight over travel of the trigger which resulted in a visual and actual jerk seen at the muzzle. All of these problems were resolved with the new Apex parts. I purchased the kits online. The labor cost from my gunsmith was about $50 each for the compacts, and $60 for the Shield.
Not every M&P has those problems. For example, my FS M&P 9 Pro CORE has a very smooth trigger pull.
As an NRA Certified Advanced Pistol Instructor and Training Counselor, my preferred firearm is the M&P 9c or 40c. I also have a M&P Shield 9mm. All three of them have had Apex DCAEK (Duty Carry Action Enhancement Kit) replacements. I did this for several reasons.
The trigger pull felt "gritty", not smooth. Also, it seemed that the compacts had a "false reset" prior to the actual reset, which wasn't easily felt or heard. There was a slight over travel of the trigger which resulted in a visual and actual jerk seen at the muzzle. All of these problems were resolved with the new Apex parts. I purchased the kits online. The labor cost from my gunsmith was about $50 each for the compacts, and $60 for the Shield.
Not every M&P has those problems. For example, my FS M&P 9 Pro CORE has a very smooth trigger pull.
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