Luth-AR 308 Buffer Assembly Carbine - Mil-Spec Black. Note: that converting a rifle length gas system to use a carbine length buffer system may cause reliability issues. Specifications for Luth-AR .308 Buffer Assembly: Manufacturer: Luth-AR Color: Black Finish: Hardcoat Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-10 Weight: 0.67 lb Projectile Caliber: .308 Caliber Gun Type: Carbine Caliber: .308 Winchester Features of Luth-AR .308 Buffer Assembly Kit includes recoil buffer components for a new .308 AR build or to convert your current AR to a Mil-Spec carbine buffer tube recoil system. Package Contents: Luth-AR .308 Buffer Assembly Carbine Tube .308/7.62 buffer spring .308/7.62 buffer body 3.8 oz Latch Plate Lock Ring What firearm models does the manufacturer say Luth-AR .308 Buffer Assembly is compatible with? The manufacturer suggests that Luth-AR .308 Buffer Assembly is compatible with AR-10Luth-AR 308-M-BAP: 308 Buffer Assembly Carbine - Mil-Spec Black