One Horse OH-15 .300 Blackout Semi-Auto Rifle, 15″ Barrel

Product Description

The One Horse OH-15 is a semi-auto .300 Blackout rifle with a 15″ barrel. It is a complete rifle in black, built around a 30-round capacity and a stock that adjusts to six positions.

The barrel carries a 1:8″ twist rate, and the muzzle is threaded 5/8×24. That thread pitch is the common size for many muzzle devices, so you can fit a brake, flash hider, or suppressor that matches it. The rifle weighs 7.14 lbs. The stock is the One Horse M4 6 Position Black A2, so you can change the length of pull to suit your frame, your gear, or your shooting position.

Who it suits

This rifle suits shooters who already like the .300 Blackout round or want to start with it. The 15″ barrel gives you a handy length that works for the range, a truck gun, or a home-defense setup. The threaded muzzle makes it a fit for anyone planning to run a suppressor, as long as they follow the laws and paperwork that apply to them.

Good gear to pair with it includes a sling, a red dot or a low-power variable optic, a weapon light, and spare 30-round magazines. Add a muzzle device that threads on at 5/8×24, and you have a rifle ready to set up your way. Because it ships as a complete rifle, most of your budget can go to the accessories you actually want.

One Horse OH-15 .300 Blackout Semi-Auto Rifle, 15" Barrel Specifications

Fits and Pairs With

• Winchester Ammunition POWER-POINT, 300 Blackout, 150 Grain, 20 Round Box
• Federal American Eagle, Suppressor Ammunition, 300AAC Blackout, 220 Grain, 20 Round Box
• Lehigh Defense Maximum Expansion, 300 Blackout, 194 Grain, Boat Tail Hollow Point, 20 Round Box
• Frontier Cartridge Frontier, 300 Blackout, 208 Grain, Subsonic, 20 Round Box

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: Is the One Horse OH-15 barrel threaded?

A: Yes. The muzzle is threaded 5/8×24, so it accepts muzzle devices with that thread pitch.

Q: What twist rate does the One Horse OH-15 have?

A: 1:8". That is the twist rate of the 15" barrel.

Q: How many rounds does the One Horse OH-15 hold?

A: 30 rounds. That is the listed capacity of this .300 Blackout rifle.

Q: How much does the One Horse OH-15 weigh?

A: 7.14 lbs. That is the rifle's weight with its 15" barrel and M4 6-position stock.

Q: Does the One Horse OH-15 have an adjustable stock?

A: Yes. It has the One Horse M4 6 Position Black A2 stock, which adjusts to six positions.

Warranty and Manufacturer

Covered by the One Horse factory warranty; warranty terms come from One Horse.

Additional information