Guntec AR-15 Gas Tube Features The Guntec USA AR-15 Gas Tube directs propellant gas from the barrel back to the bolt carrier group powering the cycling action that extracts ejects and chambers each round. Machined to carbine length at 9.75 inches it is matched specifically to carbine length gas systems rather than mid length or rifle length setups so builders need to confirm their gas system length before installing. Precise dimensions keep gas flow consistent which supports reliable cycling across a range of ammunition and bolt carrier group combinations. A properly fitted gas tube is a small part with an outsized effect on how smoothly an AR-15 runs. Constructed from 304 stainless steel this gas tube resists the corrosion and pitting that carbon steel tubes can develop after repeated exposure to high heat and powder residue. The stainless construction also holds its shape under the thermal cycling that comes with sustained firing strings helping the tube maintain proper alignment with the gas key over time. For builders assembling a complete upper or replacing a worn or bent factory gas tube this stainless carbine length tube is a dependable component. It is a sensible upgrade for anyone who wants their AR-15 s gas system built from parts meant to outlast the rifle s finish. Guntec AR-15 Gas Tube Specifications Manufacturer: GunTec Model: Gas Tube Type: Carbine Length Gas Tube Material: 304 Stainless Steel Length: 9.75 Available At: GrabAGun