Apex Tactical Specialties S&W M&P Trigger Assembly Competition Action Enhancement Kit. Our drop in kit will reduce trigger weight by approximately 4.0 lbs. (based on a starting trigger pull weight of 7.0 to 8.0 lbs.) 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. Specifications for Apex Tactical Specialties S&W M&P Trigger Assembly Competition Action Enhancement Kit: Manufacturer: Apex Tactical Specialties Caliber: .357 SIG Gun Model: Smith & Wesson M&P Pro Smith & Wesson M&P Smith & Wesson M&P Long Slide Smith & Wesson M&P Compact Smith & Wesson M&P 40 Smith & Wesson M&P 9 Trigger Installation Type: Drop-In Features of Apex Tactical Specialties M and P Trigger Assembly Competition Action Enhancement Kit: Reduces over-travel Smooths trigger pull Reduces trigger weight by approximately 4lbs (based on a starting trigger pull weight of 7.0 to 8.0 lbs.) Package Contents: Apex Tactical Specialties S&W M&P Trigger Assembly Competition Action Enhancement Kit What firearm models does the manufacturer say Apex Tactical Specialties S&W M&P Trigger Assembly Competition Action Enhancement Kit is compatible with? The manufacturer says that Apex Tactical Specialties S&W M&P Trigger Assembly Competition Action Enhancement Kit is compatible with Smith & Wesson M&P 9 Smith & Wesson M&P 40 Smith & Wesson M&P Compact Smith & Wesson M&P Long Slide Smith & Wesson M&P Smith & Wesson M&P ProApex Tactical Specialties 100-072: S&W M&P Trigger Assembly Competition Action Enhancement Kit