DPM SIG Sauer P320 Nitron Compact 45 AutoMechanical Recoil Reduction System Sig Sauer P320 Nitron Compact 45Auto SKU: 1000214 EAN: 5213007222145 MPN Code: MS SI 28 The DPM Mechanical Recoil Reduction System is a direct replacement for the stock recoil rod and does not change the configuration of the gun. This system works due to the multi spring intricate rod (3 springs) and controls the functionality of the pistol. The third spring which is contained within the rod controls the movement of