One Horse OH-GT01 AR-15 Pistol-Length Stainless Gas Tube

The One Horse OH-GT01 is a pistol-length gas tube for the AR-15 platform. Manufactured by One Horse LLC from stainless steel, this drop-in replacement is intended for AR-15 upper receivers running a pistol-length gas system.

In a direct-impingement AR-15, the gas tube routes propellant gases from the gas block back to the bolt carrier group to cycle the action. Selecting the correct gas tube length is critical for reliable function with shorter barrels and pistol-length gas systems, where port pressure and cycling timing differ from carbine or rifle configurations. The stainless construction provides strong corrosion resistance for long service life.

The OH-GT01 installs in any standard AR-15 upper receiver and ships with the gas tube and a roll pin for installation.