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The One Horse OH-15 is a complete, ready-to-run rifle chambered in 6mm ARC, the cartridge Hornady built to squeeze long-range performance out of the standard AR-15 action. Instead of moving up to a bigger, heavier AR-10 to reach distance, the OH-15 keeps everything in a familiar package while delivering noticeably flatter trajectories, less wind drift, and more energy downrange than a 5.56. The 18-inch heavy-profile barrel is the sweet spot for this round, pulling roughly 90 to 95 percent of the velocity you'd get from a longer tube while staying maneuverable enough to actually enjoy carrying and shooting.
Feeding heavy, high-BC 6mm bullets in the 100-to-108-grain range, this rifle stays supersonic way out there and shoots soft enough that follow-up shots come easy. That low recoil is a big part of the appeal, since most folks simply shoot tighter groups when a rifle isn't beating them up. The free-float M-LOK handguard gives you plenty of real estate for a bipod, light, sling, or hand stop, and the threaded muzzle makes this an easy candidate for a can if you want to run it suppressed.
Think of this as a do-it-all carbine. It's at home punching paper and ringing steel at distance, it'll handle predators and varmints out past where most calibers tap out, and with the right hunting load it's a capable choice for deer and hogs inside reasonable range. The 6mm ARC shares a bolt face with the 6.5 Grendel and feeds from dedicated magazines, so parts and ammo support keep growing every year.
Because the OH-15 runs on the standard AR-15 lower, controls, ergonomics, and most accessories carry right over from a typical 5.56 build. If you already shoot an AR, you'll feel right at home, just with a lot more reach on tap. It ships as a complete rifle with one 30-round magazine, ready to add an optic and head to the range.
With quality match ammo, capable shooters can ring steel out past 1,000 yards, and the round stays supersonic well beyond that distance. For hunting, it's a solid choice on varmints and predators out to several hundred yards and on deer-sized game inside roughly 500 yards. The 18-inch barrel on this rifle helps you get the most velocity out of those heavy, high-BC bullets.
Compared to 5.56, the 6mm ARC hits harder downrange, bucks the wind better, and roughly doubles the energy on target at 400 yards. Next to the 6.5 Grendel it shares the same bolt face and magazines but generally offers flatter trajectories and a wider bullet selection. It does all this with recoil that feels close to a .223, which is a big part of why people like it.
Yes. The 6mm ARC is a popular suppressor host thanks to its mild recoil and efficient powder charge, and this rifle's threaded muzzle makes mounting a can straightforward. Pairing it with a low-backpressure 6mm-rated suppressor keeps gas and concussion down nicely.
The lower receiver, controls, and most furniture are standard AR-15, so optics, slings, lights, and other accessories carry right over. The catch is the magazines and bolt, which are 6mm ARC and 6.5 Grendel specific rather than standard 5.56. This rifle comes with one 30-round magazine to get you started.
For long-range work, heavy high-BC bullets in the 103-to-108-grain range are the go-to and what the cartridge was designed around. Lighter 58-to-90-grain loads are great for varmints and predators, while 100-to-115-grain loads handle deer and hogs. The 18-inch barrel and fast twist on this rifle are tuned to stabilize those heavier projectiles.
It ships as a complete rifle with one 30-round magazine, so all you really need to add is an optic or sights and your ammo. Since it runs on a standard AR-15 lower, sighting it in and getting it set up will feel familiar to anyone who's shot the platform before.
| UPC | 850078799685 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OH-OG03 |
| Action | |
| Barrel Length | 18'' |
| Capacity | 30 |
| Magazine Included | 1 x 30-Round |
| Model | |
| Shipping Weight | 9.0 |
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