Luth-AR 223/308 6 Position Buffer Tube Carbine - Commercial Black. Specifications for Luth-AR 223/308 6 Position Buffer Tube: Manufacturer: Luth-AR Color: Black Finish: Hardcoat Anodized Black Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-10 AR-15 Gun Type: Carbine Condition: New Features of Luth-AR 223/308 6 Position Buffer Tube Material: 6061-T6 Aluminum Finish: Hardcoat Anodized Black Package Contents: Luth-AR 223/308 6 Position Buffer Tube What firearm models does the manufacturer say Luth-AR 223/308 6 Position Buffer Tube is compatible with? The manufacturer suggests that Luth-AR 223/308 6 Position Buffer Tube is compatible with AR-15 AR-10Luth-AR BS-15C: 223/308 6 Position Buffer Tube Carbine - Commercial Black