DPM Heckler&Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly RBA/H&K MR 308. Reduction of recoil is accomplished due to the patented multi-springs & counterweights mechanism. The system produces advanced recoil reduction by gradually slowing down the bolt carrier before stopping in the bottom the tube. Included are 2 extra buffer springs 2 counterweight springs and 1 extra heavier counterweight. The user can fine tune the rifle circle and the recoil and further to secure the correct bolt locking. Specifications for DPM Heckler & Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly: Manufacturer: DPM Gun Make: Heckler & Koch Gun Model: Heckler & Koch MR308 Heckler & Koch HK417 Fabric/Material: Spring Steel Features of DPM Heckler & Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly Faster follow up shots Bolt and Frame Protection Elimination of jams Significant recoil reduction Better double-tap concentration Better control and greater accuracy Full User Adjustability Ellimination of bolt locking failures Package Contents: DPM Heckler & Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly What firearm models does the manufacturer say DPM Heckler & Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly is compatible with? The manufacturer suggests that DPM Heckler & Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly is compatible with Heckler & Koch HK417 Heckler & Koch MR308DPM RBA/H&K MR 308: Heckler&Koch MR 308 HK 762/ HK 417/ G27 Recoil Reduction Buffer Assembly