AR .223, 5.56 and .308 Black Nitride Gas Tube With Roll Pin - Pistol Length 6.75" - SKU GTN01
Nitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface.
Nitride is a not a coating, but a metal treatment which increases surface hardness, corrosion resistance, with no heat degradation.
Correct dimensions and bends. Easy install. Comes with roll pin.