Striker block plunger could have some gunk find it's way up in there.
Cheapest/easiest fix is an Apex USB. It doesn't change any trigger or sear components, only the striker block plunger and spring, and it dramatically smooths the trigger pull.
https://apextactical.com/store/product-info.php?pid20.html
Cheapest/easiest fix is an Apex USB. It doesn't change any trigger or sear components, only the striker block plunger and spring, and it dramatically smooths the trigger pull.
https://apextactical.com/store/product-info.php?pid20.html
That's how M&P triggers are. David at Bowie tactical will do a nice job on your factory trigger. Make it smooth, decreases the reset. Google it.