DPM Soft Captured Recoil Reduction System Glock 19-23-25-32-38. Also it is compatible for low power ammunition. The 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. The kit includes 5 external springs 2 x 1.0 mm wire diameter (long set) and 3 x 1.05mm wire diameter (shorter set) all with different power rates. Package Contents: DPM Soft Captured Recoil Reduction System What firearm models does the manufacturer say DPM Soft Captured Recoil Reduction System is compatible with? The manufacturer suggests that DPM Soft Captured Recoil Reduction System is compatible with Glock 19 Glock 23 Glock 32 Glock 38 Glock 25 Glock 31 Glock 37 Glock 17 Glock 22 Glock 34 Glock 35 Ruger RXMDPM MS-GL/14: Soft Captured Recoil Reduction System Glock 19-23-25-32-38