DPM SIG Sauer P220 Swiss Army Special EditionDPM Mechanical Recoil Reduction System for Sig Sauer P220 Swiss Army Special Edition SKU: 1000182 EAN: 5213007221827 MPN Code: MS SI 21 The DPM Mechanical Recoil Reduction System is a direct replacement for the stock recoil rod and does not change the configuration of the pistol. The kit includes 2 different spring plugs. The spring plug with the marked groove is offering a heavier buffer effect and the spring plug with flat surface offers a lighter