One Horse OH15 6mm ARC Semi-Auto Rifle, 18″ Barrel, Black

Product Description

The One Horse OH15 is a 6mm ARC semi-auto rifle with an 18″ barrel and a black finish. It feeds from a 30-round magazine capacity and cycles one shot per trigger pull.

What sets the OH15 apart

The barrel is a heavy-profile (HBAR) 18″ length with a 1:7″ twist. The handguard is a 15″ M-LOK rail, so you have a lot of room to mount accessories along the front of the rifle. The rifle is listed without sights, so plan on adding your own.

This rifle suits a shooter who wants a semi-auto in 6mm ARC and likes to set it up their own way. The long rail gives you space to place a light, a bipod, a vertical grip or a sling mount where it works for you. The 18″ barrel keeps the rifle a practical length for range work and general use.

For gear, start with an optic and a mount, since the rifle does not come with sights listed. Add a sling, extra 6mm ARC magazines and M-LOK accessories as you build it out. Make sure any ammunition you buy is marked 6mm ARC.

One Horse OH15 6mm ARC Semi-Auto Rifle, 18" Barrel, Black Specifications

Fits and Pairs With

• Hornady Match, 6MM ARC, 108 Grain, 20 Round Box
• Federal American Eagle, 6MM ARC, 110 Grain, 20 Round Box
• Hornady BLACK, 6MM ARC, 105 Grain, Boat Tail Hollow Point, 20 Round Box
• Hornady Precision Hunter, 6MM ARC, 103Gr, 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: What caliber is the One Horse OH15 in this configuration?

A: 6mm ARC. Use only ammunition marked 6mm ARC in this rifle.

Q: What is the barrel twist rate on the One Horse OH15?

A: 1:7". The barrel is 18" long.

Q: How many rounds does the One Horse OH15 hold?

A: 30 rounds. It is a semi-auto, so it fires once for each trigger pull.

Q: What kind of handguard does the One Horse OH15 have?

A: A 15" M-LOK rail. It gives you room to attach lights, grips, bipods and other M-LOK accessories.

Warranty and Manufacturer

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

Additional information