Drop-in replacements for factory components enhance reliability and optimize the performance of your M&P for different applications. Same springs found in the Action Enhancement Kits can be used as high-quality replacements for worn or tired factory springs. Competition Spring Kit adds a competition striker spring and gives a 3 lb. trigger pull when used with the Hard Sear and Ultimate Striker Kit.

• Fits all M&P pistols, recent and older manufacture.
• Will not fit pistols adapted for sale in Massachusetts.