DPM IWI Jericho 941 FS Compensated Mechanical Recoil Reduction System OEM Guide Rod Length 80mm/3.15in. 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. 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 IWI Jericho 941 FS Compensated Mechanical Recoil Reduction System: Manufacturer: DPM Fabric/Material: Spring Steel Gun Make: Israel Weapon Industries (IWI) Gun Model: IWI Jericho 941FS Features of DPM IWI Jericho 941 FS Compensated 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 IWI Jericho 941 FS Compensated Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM IWI Jericho 941 FS Compensated Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM IWI Jericho 941 FS Compensated Mechanical Recoil Reduction System is compatible with IWI Jericho 941FSDPM MS-JE/4: IWI Jericho 941 FS Compensated Mechanical Recoil Reduction System OEM Guide Rod Length 80mm/3.15in