One Horse
One Horse LLC is an American firearms manufacturer producing AR-15 pattern rifles under the OH-15 designation — straightforward, mil-spec-based AR-15 carbines built for reliable performance at competitive prices. The One Horse OH-15 uses a 16-inch threaded barrel in 5.56 NATO, M-LOK free-float handguard, Picatinny top rail, and M4 6-position adjustable stock in a standard direct-impingement configuration. One Horse also produces the OH-SHYT Kit — a comprehensive spare parts kit covering the small springs, detents, and pins that are most likely to be lost during field maintenance.
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The OH-15: Straightforward AR-15 Performance
The One Horse OH-15 is a no-frills AR-15 carbine designed to deliver reliable 5.56 NATO performance in a standard configuration. The 16-inch threaded barrel (1/2x28 thread pitch) accepts standard muzzle devices and suppressors. The M-LOK handguard provides accessory mounting positions for lights, lasers, and grips without the weight of full Picatinny rail sections. The 6-position M4 collapsible stock adjusts for length of pull to fit a range of shooters. For buyers who want a functional, American-built AR-15 at a competitive price without paying for premium brand names, the OH-15 represents the straightforward approach to the AR-15 platform.
The OH-SHYT Kit: Field Maintenance Insurance
The One Horse OH-SHYT Kit is a comprehensive spare parts package covering the components most likely to be lost or damaged during AR-15 maintenance — specifically the small springs, detents, and roll pins that disappear on workshop floors and render an AR-15 non-functional without a replacement. The kit covers pivot pin detent and spring, takedown pin detent and spring, bolt catch roll pin, trigger guard roll pin, selector detent and spring, and other commonly lost components. For AR-15 owners who do their own maintenance, an OH-SHYT Kit in the range bag eliminates the frustration of a lost detent ending a range session or build project.
Frequently Asked Questions: One Horse
Is One Horse a quality AR-15 manufacturer?
One Horse produces a functional AR-15 at competitive pricing. The OH-15 uses standard mil-spec components in a conventional direct-impingement configuration. For buyers who want premium AR-15 quality from established manufacturers with documented track records, brands like BCM, Daniel Defense, and LWRC carry a premium. For buyers who want a reliable, basic AR-15 at an accessible price, the OH-15 delivers the fundamentals.
What does the threaded barrel on the OH-15 accept?
The OH-15’s 16-inch barrel uses a standard 1/2x28 thread pitch — compatible with most AR-15 muzzle devices including A2 flash hiders, compensators, muzzle brakes, and suppressor mounts. This is the most common AR-15 thread pitch and accessories are widely available.
See Also: AR-15 Rifles • AR-15 Parts • 5.56 Ammo • Suppressors • BCM Rifles