DPM CZ P09 Long Slide Mechanical Recoil Reduction System Barrel 4.53in 9mm 40S&W. This system works due to the multi spring intricate rod (3 springs) and controls the functionality of the pistol. The third spring which is contained within the rod controls the movement of the slide so it never rams on the frame. The Dark Grey spring plug is offering a heavier buffer effect than the silver spring plug that offers a lighter buffer effect (slide full open position). The external springs are different in length so the shooter can fine tune the pistol on the opening and locking positions (slide on the battery) according his/hers personal 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 CZ P09 Long Slide Mechanical Recoil Reduction System: Manufacturer: DPM Fabric/Material: Spring Steel Gun Make: CZ Gun Model: CZ P-09 Features of DPM CZ P09 Long Slide 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 P09 Long Slide Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM CZ P09 Long Slide Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM CZ P09 Long Slide Mechanical Recoil Reduction System is compatible with CZ P-09DPM MS-CZ/8: CZ P09 Long Slide Mechanical Recoil Reduction System Barrel 4.53in 9mm 40S&W