The Apex M&P Competition Action enhancement kit was designed for the action shooting sports competitor. Our drop in kit will reduce trigger weight by approximately 4 lb (based on a starting trigger pull weight of 7 to 8 lb). Whether the game is IDPA, USPSA or steel challenge, our Competition Action enhancement kit will withstand the rigors of high speed competition. Our competition striker spring and trigger return spring are shot peened to extend service life. The kit itself is engineered to be drop-in and should not require further gunsmithing (however, armorer or gunsmith installation is recommended). The M&P Competition Action enhancement kit is perfect for use with the M&P already equipped with the Apex polymer or aluminum action enhancement trigger. Features: Reduces over-travel Smooths trigger pull Reduces trigger weight by approximately 4 lb based on a starting trigger pull weight of 7 to 8 lb