WMD Guns AR-15 Carbine-Length Gas Tube Features The WMD Guns Carbine-Length Gas Tube is Nitromet processed a salt bath nitrocarburizing treatment that raises surface hardness to roughly Rc 55 for improved resistance to the extreme heat generated near the gas block. This treatment also provides meaningfully better corrosion resistance than an untreated stainless gas tube which matters for a part that sits directly in the path of hot combustion gases on every cycle. Built from mil-spec 304 stainless steel the tube is designed to hold its shape and function reliably across a long service life. The rich black Nitromet finish also gives the gas tube a clean consistent appearance that matches a blacked out build. Measuring approximately 9.75 inches to fit carbine length gas systems this gas tube is compatible with AR-15 and AR-308 platforms using a carbine length system. It ships complete with a roll pin for straightforward installation into the gas block and receiver. WMD Guns brings together metallurgists chemists gunsmiths and plating engineers to produce components and coatings in-house reflecting a level of process control not common among gas tube makers. This gas tube is a simple durable upgrade for any carbine length AR build. WMD Guns AR-15 Carbine-Length Gas Tube Specifications Manufacturer: WMD Guns Model: Carbine-Length Gas Tube Type: Gas Tube Color: Black Finish: Nitromet Material: Stainless Steel Compatible Hosts: AR-15 AR-308 Length: 9.75 Available At: GrabAGun