USED DPM Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System Self-Lock Spring Plugs Stainless Steel/Black Oxide MS-GLG5-2. The system works due to the multi spring intricate recoil rod (3 different energetic springs) controls the functionality of the pistol and replaces the stock recoil rod without requiring any modification. For changes to features like comp set-up threaded barrels slide conversions etc. contact us via email at infoatdpmsystems.com before placing your order. In some cases we need to determine whether a custom product is required. 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 Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System: Manufacturer: DPM Fabric/Material: Spring Steel Gun Make: Glock Gun Model: Glock 21 Gen 5 Glock 20 Gen 5 Features of DPM Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System User Adjustability 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 Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System What firearm models does the manufacturer say DPM Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System is compatible with? The manufacturer suggests that DPM Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System is compatible with Glock 20 Gen 5 Glock 21 Gen 5DPM MS-GLG5-2: Glock 20/21 Gen 5/8 Adjustable Settings Mechanical Recoil Reduction System Self-Lock Spring Plugs Stainless Steel/Black Oxide