The DPM Recoil Reduction System works due to the multi spring intricate rod (3 springs) effect like a brake on the slide, but only before stopped on the frame to the last 6 to 8 millimeters of the movement.
In some cases the DPM Recoil System offer almost double force in the slide full open position compared with the factory OEM spring , so the slide of the pistol touching the frame gently and offering less recoil to the pistol.
Further the moving parts of the pistol are protected, offering longer life to the pistol.
Overall Advantages
Read carefully installation instructions.