Kaw Valley Precision Mil-Spec 6-Position Buffer Tube Black Small. It contains everything needed to install Mil-Spec stocks from Magpul BCM MFT Luth-AR and many others. Specifications for Kaw Valley Precision Mil-Spec 6-Position Buffer Tube: Manufacturer: Kaw Valley Precision Color: Black Finish: Nitride Fabric/Material: 7075-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Length: 7.2 in Diameter: 1.44 in Condition: New Package Contents: Kaw Valley Precision Mil-Spec 6-Position Buffer Tube What firearm models does the manufacturer say Kaw Valley Precision Mil-Spec 6-Position Buffer Tube is compatible with? The manufacturer says that Kaw Valley Precision Mil-Spec 6-Position Buffer Tube is compatible with AR-15Kaw Valley Precision KVP-BT-6P: Mil-Spec 6-Position Buffer Tube Black Small