The Apex Action Enhancement Trigger directly replaces the factory hinged trigger with a solid body polymer trigger"" and a center mounted pivoting safety. The rounded face of the trigger provides a smooth comfortable surface for the shooter's finger while firing. The trigger also reduces pre-travel and over-travel by approximately 20% from the factory trigger. Perfect for use in M&P's already equipped with an Apex Competition Action Enhancement Kit or Duty/Carry Action Enhancement Kit. It can be used in conjunction with any combination of M&P internals presently available from Apex Tactical (excluding the Forward Set Sear & Trigger Kits) as well as any configuration from the S&W factory.