Bootleg Inc Gas Tube Mid Length AR 15 SBN Black Finish Roll Pin Included Black BP-GTM- SBN. These AR Gas Tubes by Bootleg Inc are constructed from stainless steel for maximum durability and efficiency. Plus this Bootleg Inc SBN Gas Tube has a Salt Bath Nitride coating that provides it with uniform protection. Don't skimp out on such an integral part of your firearm. Get a premium method of gas release when you install a Bootleg Inc AR Gas Tube. Specifications for Bootleg Inc Gas Tube AR 15 Roll Pin Included Black: Manufacturer: Bootleg Inc Color: Black Finish: SBN Additional Features: Roll Pin Package Contents: Bootleg Inc Gas TubeAR 15 SBN Black Finish Roll Pin Included Bootleg Inc BP-GTM- SBN: Gas Tube Mid Length AR 15 SBN Black Finish Roll Pin Included Black