Luth-AR 308 Buffer Tube Assembly Rifle Black. 308/7.62 AR A2 Rifle build or to convert your current AR Carbine to a A2 AR Rifle buffer tube recoil system. Note: Converting a carbine length gas system to use a A2 Rifle length buffer system may cause reliability issues. Specifications for Luth-AR .308 Rifle Buffer Tube Assembly: Manufacturer: Luth-AR Color: Black Finish: Hardcoat Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-10 Condition: New Weight: 11.2 oz Projectile Caliber: .308 Caliber Caliber: .308 Winchester Gun Type: Rifle Package Contents: Luth-AR .308 Rifle Buffer Tube Assembly (1) .308/7.62 Buttstock Extension Tube (1) Standard .308/7.62 Buttstock Buffer Spring (1) Standard Buffer Body Assembly 5.3 oz What firearm models does the manufacturer say Luth-AR .308 Rifle Buffer Tube Assembly is compatible with? The manufacturer says that Luth-AR .308 Rifle Buffer Tube Assembly is compatible with AR-10Luth-AR BAP-308: 308 Buffer Tube Assembly Rifle Black