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There's something refreshing about an AR-15 that doesn't try to reinvent the wheel. The One Horse OH-15 sticks to what works: a 16-inch SOCOM profile barrel chambered in 5.56 NATO (it runs .223 Rem too), a 1:8 twist that stabilizes everything from lightweight 55 grain plinking ammo up to heavier match loads, and a mid-length gas system that makes the whole rifle feel smoother behind the trigger. Built in the USA with American-sourced parts, it comes in at a manageable 7.14 pounds and feeds from an included 30-round Magpul magazine.
Plenty of rifles in this class still run carbine-length gas, which tends to be over-gassed and snappy. The OH-15's mid-length setup slows the cycle down just enough to soften the recoil impulse, ease wear on internals, and keep your sights settled for quicker follow-ups. Combine that with the SOCOM barrel profile and you get a carbine that stays balanced without feeling nose-heavy on longer range sessions.
The 15-inch M-LOK handguard gives you nearly the full length of the barrel to work with, so lights, hand stops, bipods, and sling mounts all have a home. Up top, the flat Picatinny rail on the receiver handles red dots, LPVOs, or backup irons. The muzzle is threaded 1/2×28 with a standard A2 device installed, so a muzzle brake or suppressor swaps on easily down the road. Everything is built to mil-spec dimensions, meaning the aftermarket is wide open when you're ready to tinker.
The furniture is straightforward and proven: One Horse's M4-style 6-position stock on a mil-spec buffer tube adjusts for different shooters and layers of gear, and the classic A2 grip fits most hands without fuss. Whether this is your first AR or a dependable addition to the safe, the OH-15 covers range days, training classes, and home defense duty without asking for much in return.
Yes. The OH-15 is chambered for 5.56 NATO, which means it safely handles both 5.56 and .223 Remington ammunition. That gives you plenty of flexibility, since .223 is often cheaper for range days while 5.56 offers a bit more punch for defensive use.
A mid-length gas system moves the gas port farther down the barrel compared to a carbine-length setup, which lowers port pressure and slows the cycling just slightly. The result is a softer recoil impulse, less wear on the bolt carrier group, and better control during rapid fire. It's one of the more meaningful upgrades you'll find on a rifle in this class.
It is. The rifle is built to mil-spec dimensions, so triggers, grips, stocks, and charging handles from the huge AR-15 aftermarket will drop in. The 15-inch M-LOK handguard accepts lights, slings, and hand stops, and the flat top Picatinny rail handles just about any optic you'd want to mount.
Yes, the 16-inch barrel is threaded 1/2×28, which is the standard thread pitch for 5.56 muzzle devices. It ships with an A2 flash hider installed, and swapping to a brake, compensator, or suppressor mount is a quick job with basic tools.
| UPC | 850078799593 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OH-OG01 |
| Action | |
| Barrel Finish | Black |
| Barrel Length | 16" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 |
| Color | Black |
| Magazine Included | 1 x 30-Round |
| Model | |
| Shipping Weight | 8.3 |
| Thread Pattern | 1/2"x28 |
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