Smith & Wesson M&P 45 Shield Slide Stop Assembly Used – Part# MP45F4 Model 28 Smith & Wesson Model 639

Smith & Wesson Model 639 Stainless Steel 9mm Disconnector Assembly

Disconnector

engaging the sear and releasing the striker

Factory New Smith & Wesson J Frame Firing Pin

Smith & Wesson M&P 45 Shield Slide Stop Assembly Used – Part# MP45F4 Model 28 Smith & Wesson Model 639Smith & Wesson M&P 45 Shield Slide Stop Assembly Used Part Number: MP45F4 Condition: Used (Factory Original) Caliber: . 45 ACP Restore your M&P 45 Shield to factory correct function with this genuine Smith & Wesson slide stop assembly. The slide stop locks the slide open after the last round is fired and allows the slide to be released when a fresh magazine is inserted a worn or damaged slide stop can cause failure to lock back or difficulty releasing