Luth-AR 223 Buffer Assy Package Carbine - Mil-Spec Black. Specifications for Luth-AR .223 Carbine Buffer Tube Assembly: Manufacturer: Luth-AR Color: Black Finish: Hardcoat Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Carbine Caliber: .223 Remington Features of Luth-AR .223 Carbine Buffer Tube Assembly Kit includes recoil buffer components for a new .223 AR15 Carbine build or to convert your current AR15 to use a Mil-Spec carbine buffer tube recoil system. Package Contents: Luth-AR .223 Carbine Buffer Tube Assembly What firearm models does the manufacturer say Luth-AR .223 Carbine Buffer Tube Assembly is compatible with? The manufacturer suggests that Luth-AR .223 Carbine Buffer Tube Assembly is compatible with AR-15Luth-AR 223-M-BAP: 223 Buffer Assy Package Carbine - Mil-Spec Black