SIG SAUER P 228-P229
The DPM Systems Recoil Reduction System upgrade is a direct replacement for the stock recoil rod and does not change the configuration of the firearm. This system works due to the multi spring intricate rod (three springs system) and controls the functionality of the weapon. The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame. Also accompanying this system are two separate springs so the owner can fine-tune their firearms to match their personal needs and make them safer to use.