One Horse OH-15 | 6mm ARC | 18in | 30rd | OH-OG03

The One Horse OH-15 is a complete AR-style rifle chambered in 6mm ARC with an 18-inch HBAR barrel and a 15-inch M-LOK handguard. It pairs practical handling and extended effective range in a package intended for precision-oriented shooters who want a versatile carbine-length platform. For an optic that complements the OH-15 without exceeding $1,000, consider the Vortex Viper PST Gen II 1-6×24 for close-to-mid range work and rapid target acquisition. This rifle is well suited to precision target work and varmint or small-game hunting where flat trajectory and retained energy matter.

Product Specifications

• The caliber is 6mm ARC.
• The barrel length is 18 in..
• The barrel profile is HBAR.
• The muzzle thread is 5/8X24.
• The twist rate is 1/7.
• The gas system is Mid-Length.
• The muzzle device is an A2.
• The handguard length is 15 in..
• The charging handle is Standard.
• The buffer tube is a Mil-Spec Buffer Tube.
• The grip is an A2 Grip.
• The stock is a One Horse M4 6 Position.
• The magazine type is 6mm ARC Compatible and ships with a 30-round capacity.
• The manufacturer is One Horse.
• The country of origin is U.S.A and the UPC is 850078799685.

The OH-15 delivers a balance of reach and controllability: the 18-inch HBAR and mid-length gas system smooth recoil impulse while the 15-inch M-LOK handguard provides modularity for lights and mounts. Whether building a precision-oriented carbine or selecting a suppressor-capable platform for range work, this rifle offers a straightforward, serviceable foundation with military-style furniture and familiar controls. Its parts and layout make it practical for shooters who value durability, predictable accuracy, and a platform that is ready for optics and accessories.