Wolff 13LB Recoil Spring for S&W M&P 9mm/.40/.357 - Full Size (53213) Police 624 N-Frame

624 N-Frame

Note: This is the new style thumb piece

357 Caliber Bolt Assembly

Complete Assembly - Includes guide rod

Wolff 13LB Recoil Spring for S&W M&P 9mm/.40/.357 - Full Size (53213) Police 624 N-FramePremium Wolff Recoil Spring Kit for S&W M&P Series Upgrade your Smith & Wesson M&P pistol's performance with this high quality Wolff 13LB recoil spring kit. Engineered by Wolff Gunsprings, the industry leader in precision firearm springs since 1958, this kit delivers enhanced reliability and smoother cycling. What's Included: 13LB Recoil Spring Firing Pin Spring Key Benefits: Improved Reliability: Reduces malfunctions and ensures consistent cycling