DPM Systems USA INC
GLOCK GEN 4 40 10mm
This DPM Systems Mechanical Recoil Rod System upgrade is a direct replacement for the stock recoil rod and does not change the configuration of the gun itself. This system works due to the multi spring intricate rod (three springs system) and controls the functionality of the firearms. The third spring which is contained within the rod controls the movement of the slide so it never rams on the firearms 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.