SMITH & WESSON M&P 45 Barrel 4" .45ACP glockrecoilspringsupgrade 1 spare washer and 3

1 spare washer and 3 external springs

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

DPM Telescopic Recoil Reduction System Arsenal Firearms Strike Two 4″

and functions like a buffer on the slide

If a lube runs out and makes a mess

SMITH & WESSON M&P 45 Barrel 4" .45ACP glockrecoilspringsupgrade 1 spare washer and 3DPM 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