DPM Springfield XD-S Mod2 Adjustable Mechanical Recoil Reduction System 4in Barrel. The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame. The system offers 9 different adjustable settings so the user can fine tune the firearm according to hers/his personal shooting standards. The Spring Plug must always be installed when the DPM Recoil Rod and springs are used. As lead the evolution of recoil reduction technology products may change versions (new design with different springs with or without plugs washers etc.) without any prior notice. Specifications for DPM Springfield XD-S Mod2 4in Barrel Adjustable Mechanical Recoil Reduction System: Manufacturer: DPM Fabric/Material: Spring Steel Gun Make: Springfield Armory Gun Model: Springfield Armory XD-S Features of DPM Springfield XD-S Mod2 4in Barrel Adjustable Mechanical Recoil Reduction System Faster follow up shots Improved firing speed Slide and Frame Protection Elimination of jams Significant recoil reduction Better double-tap concentration Better control and greater accuracy Package Contents: DPM Springfield XD-S Mod2 4in Barrel Adjustable Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM Springfield XD-S Mod2 4in Barrel Adjustable Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM Springfield XD-S Mod2 4in Barrel Adjustable Mechanical Recoil Reduction System is compatible with Springfield Armory XD-SDPM MS-SPR/14: Springfield XD-S Mod2 Adjustable Mechanical Recoil Reduction System 4in Barrel