DPM Cheetah Mechanical Recoil Reduction System Beretta 84-85 FS. 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. Included with the kit are 3 separate springs so the user can fine-tune the weapon for his/hers personal standards. The longer spring (more coils) is stronger and has a heavier pound rating than the shorter spring. 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 Beretta 84/85 FS Cheetah Mechanical Recoil Reduction System: Manufacturer: DPM Fabric/Material: Spring Steel Gun Make: Beretta Gun Model: Beretta Cheetah 85F Beretta Cheetah 84 Features of DPM Beretta 84/85 FS Cheetah 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 Beretta 84/85 FS Cheetah Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM Beretta 84/85 FS Cheetah Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM Beretta 84/85 FS Cheetah Mechanical Recoil Reduction System is compatible with Beretta Cheetah 84 Beretta Cheetah 85FDPM MS-BE/15: Cheetah Mechanical Recoil Reduction System Beretta 84-85 FS