NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit Large Frame. The same quality components high-end coatings and innovative recoil reduction technology that are used in NEMOs OMEN and XO model lineup are now available in a kit for your large frame AR. Use this kit whether you are building a rifle from the ground up or looking to reduce recoil in your existing rig. The technology in the bolt carrier group reduces bolt speeds and felt recoil when the recoiling mass bottoms out in the buffer tube. Other products are designed to minutely dampen the force at the moment the recoiling mass bottoms out whereas NEMOs design creates a dynamic solution at the beginning of recoil that creates a low ''bottom-out'' force. This is accomplished by forcing the buffer to bottom out and start its return before the BCG has finished its recoil cycle. The buffer and BCG momentum are opposite and the result is a noticeable low impact ''bottom-out'' force. Specifications for NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit - Large Frame: Manufacturer: NEMO Arms Fabric/Material: Steel Caliber: 6.5mm Creedmoor .308 Winchester Gun Make: AR Platform Gun Model: DPMS LR-308 AR-10 Gun Type: Rifle Features of NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit - Large Frame Castle Nut & Receiver Plate NOT included. Package Contents: NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit - Large Frame Recoil Reduction Carrier Plunger System High Pressure Bolt Ti Firing Pin w/ Return Spring Tool Steel Ejector Extractor w/ High Strength Springs One-Piece Gas Ring POFs Patented Roller Cam Pin Nickel Boron Staked Carrier Key What firearm models does the manufacturer say NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit - Large Frame is compatible with? The manufacturer suggests that NEMO Arms Recoil Reduction Bolt Carrier Group and Buffer Kit - Large Frame is compatible with AR-10 DPMS LR-308NEMO Arms NSP-LF-BCG-RRK: Recoil Reduction Bolt Carrier Group and Buffer Kit Large Frame