DPM SIG Sauer P320-XTEN COMP 3.8" BARREL 10MMDPM Mechanical Recoil Reduction System for SIG P320 XTEN COMP 3. 8" BARREL 10MM SKU: 1000345 EAN: 5213007223456 MPN Code: MS SI 37 The DPM recoil reduction system works due to the multi spring intricate recoil rod (3 different energetic springs), controls the functionality of the pistol and replaces the stock recoil rod without requiring any modification. The third spring which is contained within the recoil rod controls the movement of the slide so