Description
The One Horse OH-GT03 is an AR-15 mid-length gas tube constructed from stainless steel for durable, corrosion-resistant performance in standard Mil-Spec upper receivers.
Built for use in mid-length gas system AR-15 builds, the OH-GT03 measures 11.7″ overall and pairs with standard barrels and low-profile gas blocks to deliver softer recoil, smoother cycling, and improved reliability over carbine-length configurations.
Its stainless steel construction resists heat, gas, and fouling while maintaining the precise alignment a bolt carrier group needs for consistent function. Whether you are assembling a new AR-15 from a stripped upper or replacing a worn factory tube, the One Horse OH-GT03 is a straightforward drop-in upgrade for any standard mid-length platform.
- Mid-length gas tube designed for AR-15 platforms
- 11.7″ overall length for mid-length gas system builds
- Stainless steel construction for durability and corrosion resistance
- Mil-Spec compatible with standard AR-15 uppers, barrels, and gas blocks
- Provides softer recoil and smoother cycling than carbine-length gas systems








