Luth-AR 223 Buffer Tube Assembly A2 Black. 223/5.56 AR15 Rifle build or to convert your current AR15 Carbine to a A2 AR15 Rifle buffer tube recoil system. Specifications for Luth-AR .223 Rifle Buffer Tube Assembly - A2: Manufacturer: Luth-AR Color: Black Finish: Hardcoat Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Condition: New Weight: 11.2 oz Caliber: .223 Remington Gun Type: Rifle Features of Luth-AR .223 Rifle Buffer Tube Assembly - A2: Shipping Weight 1 lbs Shipping Dimensions 8 x 4 x 2 in Application Rifle Caliber .223 Weight Ounce 11.2 Weight lbs .7 UPC Code 859819007102 Package Contents: Luth-AR .223 Rifle Buffer Tube Assembly - A2 (1) A2 Rifle Buttstock Extension Tube (1) Standard .223/5.56 Rifle Buttstock Buffer Spring (1) Standard Rifle Buffer Body Assembly What firearm models does the manufacturer say Luth-AR .223 Rifle Buffer Tube Assembly - A2 is compatible with? The manufacturer suggests that Luth-AR .223 Rifle Buffer Tube Assembly - A2 is compatible with AR-15Luth-AR BAP-1: 223 Buffer Tube Assembly A2 Black