DPM Walther PPS &PPS M2 Subcompact Telescopic System Mechanical Recoil Reduction System Stainless. The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame. Also 2 separate external springs are included with the system. The springs are different in length with the longest being heaviest when the slide is on the battery so the shooter can fine-tune the weapon for his/hers personal standards. Specifications for DPM CZ P-10 Micro 9mm Telescopic Mechanical Recoil Reduction System: Manufacturer: DPM Color: Stainless Finish: Black Oxide Fabric/Material: Stainess Steel Condition: New Features of DPM CZ P-10 Micro 9mm Telescopic 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 CZ P-10 Micro 9mm Telescopic Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM CZ P-10 Micro 9mm Telescopic Mechanical Recoil Reduction System is compatible with? The manufacturer says that DPM CZ P-10 Micro 9mm Telescopic Mechanical Recoil Reduction System is compatible with Springfield Armory XD Mod2 CZ P-10 M Walther PPS Walther PPS M2 Walther P99 Compact Springfield Armory XD Springfield Armory XD-MDPM TRS-WA/4: Walther PPS &PPS M2 Subcompact Telescopic System Mechanical Recoil Reduction System Stainless