LBE Unlimited AR-15 Gas Tube Carbine Length Melonite Finish Black. They take immense pride in supporting jobs maintaining rigorous quality control and ensuring their customers receive parts they can trust no matter the application. Specifications for LBE Unlimited AR-15 Gas Tube: Manufacturer: LBE Unlimited Color: Black Finish: Melonite Fabric/Material: 304 Stainless Steel Gun Make: AR Platform Gun Model: AR-15 Features of LBE Unlimited Carbine-Length Gas Tube Melonite Finish Black: AR15 Carbine Length Gas tube Package Contents: LBE Unlimited AR-15 Gas Tube Gas tube Roll Pin What firearm models does the manufacturer say LBE Unlimited AR-15 Gas Tube is compatible with? The manufacturer says that LBE Unlimited AR-15 Gas Tube is compatible with AR-15LBE Unlimited ARGTC-BLK: AR-15 Gas Tube Carbine Length Melonite Finish Black