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There's a lot to like about a well-built 10.5 inch 5.56 AR pistol. It's short enough to move through tight spaces without snagging on everything, light enough to hold on target without wearing out your arms, and it still puts rounds where you want them. The One Horse OH-15 checks those boxes with a medium profile barrel, a 1:8 twist that stabilizes everything from lightweight varmint loads up to heavier 77 grain match ammo, and a carbine-length gas system tuned to cycle reliably at this barrel length.
The 9.25 inch M-LOK handguard gives you plenty of real estate for a light, hand stop, or sling mount without adding bulk where you don't need it. Out back, a KAK brace rides on a mil-spec buffer tube and adds a solid contact point that makes a big difference in control, especially during quick follow-up shots. The muzzle wears a standard A2 device on 1/2×28 threads, so swapping to a flash hider, comp, or suppressor mount down the road is a five minute job. An A2 grip and standard charging handle keep everything familiar if you've spent any time behind an AR.
One Horse builds the OH-15 in the USA around proven mil-spec compatible components, which means parts support is easy and upgrades bolt right on. At just over 7 pounds with a 30-round magazine included, it makes a lot of sense as a truck gun, a home defense setup, or a compact range companion for drills and training. The pistol format keeps the whole package short and quick-handling, which is exactly where a 10.5 inch 5.56 shines.
If you've been wanting a short-barreled AR platform without piecing one together yourself, the OH-15 arrives complete and ready to run. Load the mag, zero your optic, and get to work.
The 1:8 twist rate is a great middle-of-the-road choice that stabilizes a wide range of bullet weights. It handles common 55 grain range ammo just fine and also does well with heavier 62 to 77 grain loads. For a 10.5 inch barrel, many folks favor 62 grain and up for better performance out of the shorter tube.
Yes. The barrel comes threaded 1/2×28, which is the standard thread pitch for 5.56, and it ships with an A2 muzzle device installed. Swapping to a different comp, flash hider, or suppressor mount is quick and easy with basic armorer tools.
It is. The OH-15 is built on mil-spec compatible components including a mil-spec buffer tube, standard charging handle, and A2 grip, so the huge aftermarket of AR parts and accessories fits right up. It also runs standard AR-15 magazines, and one 30-rounder is included.
The M-LOK slots let you bolt on accessories like a weapon light, sling mount, hand stop, or angled grip without any rail adapters. At 9.25 inches, it covers most of the 10.5 inch barrel, giving you a comfortable support hand position while keeping the whole package compact and snag-free.
| UPC | 850078799791 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OH-OP01 |
| Action | |
| Barrel Length | 10.5'' |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 |
| Color | Black |
| Magazine Included | 1 x 30-Round |
| Model | |
| Number of Magazines | 1 |
| Safety | Thumb |
| Shipping Weight | 7.1 |
| Sights Type | NONE |
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