Bootleg Inc Gas Tube Rifle Length AR 15 SBN Black Finish Roll Pin Included Black. Specifications for Bootleg Inc Rifle Length Gas Tube: Manufacturer: Bootleg Inc Finish: Black Fabric/Material: Stainless Steel Gas System Length: Rifle Length Gun Model: AR-15 Additional Features: Roll Pin Included Package Contents: Bootleg Inc Rifle Length Gas Tube What firearm models does the manufacturer say Bootleg Inc Rifle Length Gas Tube is compatible with? The manufacturer suggests that Bootleg Inc Rifle Length Gas Tube is compatible with AR-15Bootleg Inc BP-GTR-SBN: Gas Tube Rifle Length AR 15 SBN Black Finish Roll Pin Included Black