TacFire's AR15 gas tube is constructed of stainless steel and is head/corrosion resistant treated. It is ideal for building your AR15/M16, replacement or upgrade part. The gas tube pins into the front sight or gas block. This model has a pistol length.Our AR-15 pistol length gas tube is constructed of 304 hardened stainless steel for strength and durability. The AR-15 pistol gas tube is heat and corrosion resistant from elements to ensure consistent gas flow to help your rifle cycle properly. This AR-15 gas tube fits most Pistol length gas systems. This is great if you're building an AR-15, or sourcing parts for replacement or upgrade. It Pins into front sight or gas block, No gunsmithing is required. Features: Constructed of 304 stainless steel High corrosion resistance from elements