The One Horse OH-15 Complete Rifle in 6mm ARC (One Horse part no. OH-OG03) is built for shooters who want reach and precision without moving into full designated-marksman-rifle territory. It’s fitted with an 18-inch HBAR-profile barrel and a 1:7-inch twist rate, threaded 5/8×24 and capped with an A2 muzzle device. A mid-length gas system smooths out recoil impulse, and the 15-inch handguard keeps the profile slim while offering plenty of room for lights and optics. One Horse rounds out the build with a Mil-Spec buffer tube, A2 grip, and a One Horse M4 6-position stock for an adjustable length of pull. Feeding from a 30-round 6mm ARC-compatible magazine, this flat-shooting, smooth-cycling carbine is built for stretching steel at distance, running suppressed, or serving as a capable home-defense rifle with real reach.
Key Specifications
- Chambered in 6mm ARC for flat-shooting performance at extended range.
- Fitted with an 18-inch HBAR-profile barrel.
- Uses a 1:7-inch twist rate for stabilizing 6mm ARC bullet weights.
- Threaded 5/8×24 and fitted with an A2 muzzle device.
- Runs a mid-length gas system for smoother cycling.
- Wears a 15-inch handguard for mounting lights and optics.
- Built with a Mil-Spec buffer tube and an A2 grip.
- Includes a One Horse M4 6-position stock for an adjustable length of pull.
- Feeds from a 30-round, 6mm ARC-compatible magazine.
Frequently Asked Questions
What caliber does this OH-15 shoot? It’s chambered in 6mm ARC, a flat-shooting round built for extended-range accuracy.
What gas system does it use? It runs a mid-length gas system for smoother recoil impulse.
Is the stock adjustable? Yes, the One Horse M4 stock adjusts across 6 positions for length of pull.
Buy the One Horse OH-15 6mm ARC
Shooters who want extended reach without moving into DMR territory should look closely at this 6mm ARC build. Order this One Horse rifle from our AR rifle selection at Schaefer Defense, and we’ll ship it insured to your local FFL from our Lubbock, Texas shop.
