Apex Tactical Specialties 107003 Action Enhancement Black Polymer Drop-In Trigger - Fits S&W SD9/40/357, SDVE9/40/357, Sigma

The Apex Tactical Specialties Action Enhancement is a drop-in replacement trigger designed to sharpen feel and shorten reset on the factory S&W trigger. Engineered specifically for the S&W SD9, SD40, SD357, SDVE9, SDVE40, SDVE357, and Sigma series pistols, this kit installs without permanent modification and delivers a noticeably cleaner break out of the box.

The trigger body is molded from durable black polymer, keeping the assembly lightweight while holding up to repeated dry-fire and live-fire use. Apex refined the shoe geometry to reduce pre-travel and over-travel, helping follow-up shots come faster and giving each pull a more consistent, defined feel from shot to shot. Because the trigger drops into the existing housing using the factory pins and springs, installation is straightforward for anyone comfortable with basic field stripping of the pistol - no fitting, stoning, or gunsmithing required.

This part is caliber-agnostic across the SD/SDVE/Sigma family, so the same trigger fits 9mm Luger, .40 S&W, and .357 SIG SD-platform pistols. The MPN 107003 designates the black polymer version of the Action Enhancement kit for these Smith & Wesson models.