SMITH & WESSON M&P 45 Barrel 4" .45ACP glockrecoilspringsupgrade Compliance Tested: U

Compliance Tested: U

Also included with the system are 3 external springs so the shooter can fine-tune the weapon for his/her personal standards

1 spare washer and 3 external springs

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SMITH & WESSON M&P 45 Barrel 4" .45ACP glockrecoilspringsupgrade Compliance Tested: UDPM Mechanical Recoil Reduction System for Smith & Wesson M&P 45 4 Barrel This system works due to the multi spring intricate rod (3 springs) and controls the functionality of the gun. The third spring, which is contained within the rod, controls the movement of the slide so it never rams on the frame. Included with the system are 2 separate springs so the user can fine tune the weapon for his her personal standards. The longer spring (more coils) is