This is a Bootleg Gas Tube, model BP-GTC-SBN.
When it comes time to replace your gas tube" or you're simply customizing your upper assembly" the gas tubes are an integral part of your upper receiver assembly" so it's important to ensure you're shopping for quality products! For gas tubes that will last" shop Bootleg" Inc. today!
Features:
Made from stainless steel for durability
Salt Bath Nitriding (SBN) coating for uniform protection