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The One Horse OH-BR01 is a 16-inch AR-15 barrel chambered in 5.56 NATO, built to the classic M4 contour that so many builders reach for. It runs a carbine-length gas system and a 1:7 twist rate, which is the sweet spot for stabilizing heavier projectiles while still handling lighter loads without a fuss. The nitride finish inside and out is the kind of treatment you want on a working gun, since it fights corrosion and holds up to plenty of range time.
The M4 profile is popular for a reason. It trims weight from the muzzle end where you feel it most, giving you a balanced, quick-handling rifle without going full pencil thin. The carbine gas setup keeps things simple and reliable, cycling a broad range of factory 5.56 and .223 ammo. That 1:7 twist means you can feed it 62-grain green tip, 69-grain match, or heavier 75 to 77-grain loads and expect solid stabilization downrange.
This is a standard M4-pattern barrel, so it drops into a mil-spec upper the way you'd expect. It carries an M4 feed ramp extension and a .750 gas block journal, so your favorite carbine-length gas block and tube will seat right up. The muzzle is threaded 1/2×28, ready for whatever flash hider, brake, or suppressor mount you like to run.
One Horse builds these barrels for folks putting together a dependable range gun, a defensive carbine, or a first AR-15 without overspending on the barrel. It's a proven recipe done cleanly, and it gives you a reliable foundation to build the rest of your rifle around.
The OH-BR01 runs a 1:7 twist. That's a versatile rate that stabilizes heavier match and defensive loads in the 69 to 77-grain range while still shooting lighter 55 and 62-grain ammo just fine. If you plan to run a mix of bullet weights, 1:7 is a dependable choice.
Yes. The OH-BR01 uses a carbine-length gas system with a .750 gas block journal, so common carbine-length gas blocks and gas tubes bolt right up. It's an M4-profile barrel with M4 feed ramps, so it fits mil-spec uppers and standard handguard setups without surprises.
It is. The muzzle comes threaded 1/2×28, which is the standard 5.56 pitch. That lets you run flash hiders, muzzle brakes, compensators, or a suppressor adapter of your choice.
Yes. A barrel chambered in 5.56 NATO safely handles both 5.56 and .223 Remington ammunition, which gives you flexibility on the range. Running .223 in a 5.56 chamber is fine and a common practice among AR builders.
| UPC | 850078799104 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OHBR01 |
| Barrel Length | 16'' |
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