DPM CZ 75 SP-01 Shadow/Shadow Line Tactical Phantom Mechanical Recoil Reduction System Stainless. This Recoil Reduction System by DPM has three springs and controls the functionality of the gun. The third spring contained within the rod controls the movement of the slide that never rams on the frame. The DPM Recoil Reduction System also includes two different spring so the shooter could fine tune the opening and locking position of the pistol. The system includes two short springs with wire diameter 1.0mm for use with heavy ammo and two long springs with wire diameter 0.95mm for use with soft and hand load ammunition so the shooter could fine tune the pistol according to his/her personal standards. Specifications for DPM CZ 75 SP-01 Shadow/Shadow Line Tactical Phantom Mechanical Recoil Reduction System: Manufacturer: DPM Color: Stainless Fabric/Material: Stainess Steel Gun Make: CZ Gun Model: CZ 75 SP-01 Shadow CZ 75 Tactical Sport Features of DPM CZ 75 SP-01 Shadow/Shadow Line Tactical Phantom 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 75 SP-01 Shadow/Shadow Line Tactical Phantom Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM CZ 75 SP-01 Shadow/Shadow Line Tactical Phantom Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM CZ 75 SP-01 Shadow/Shadow Line Tactical Phantom Mechanical Recoil Reduction System is compatible with CZ 75 Tactical Sport CZ 75 SP-01 ShadowDPM MS-CZ/4: CZ 75 SP-01 Shadow/Shadow Line Tactical Phantom Mechanical Recoil Reduction System Stainless