DPM CZ 79 Champion Mechanical Recoil Reduction System 9 mm 40 S&W. This system works due to the multi spring intricate rod (3 springs) and controls the functionality of the gun. The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame. Also 3 separate external springs and a safety pin 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. 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 CZ 79 Champion Mechanical Recoil Reduction System: Manufacturer: DPM Fabric/Material: Spring Steel Gun Make: CZ Gun Model: CZ 75 Champion Features of DPM CZ 79 Champion 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 79 Champion Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM CZ 79 Champion Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM CZ 79 Champion Mechanical Recoil Reduction System is compatible with CZ 75 ChampionDPM MS-CZ/6: CZ 79 Champion Mechanical Recoil Reduction System 9 mm 40 S&W