Mil-spec AR-15 stainless steel gas tube finished in salt-bath black nitride — adds meaningful corrosion resistance over a bare stainless tube and matches the rest of a black rifle build instead of leaving a polished line above the handguard. Choose your length to match the barrel's gas-port location: pistol, carbine, mid, or rifle.
Standard mil-spec inner diameter holds the same gas dwell and pressure curve as a factory tube, so it drops into any standard front sight base or low-profile gas block without re-tuning. The black-nitride layer protects the high-heat zone where the tube enters the gas key on the bolt carrier — the spot most likely to pit and discolor over time.
Match the length to your barrel's gas-port distance from the chamber face — running a tube that's too short or too long for the port location will under- or over-gas the rifle. A new roll pin and proper tube-to-gas-block alignment are both required for proper installation.
