The One Horse OH-15 is an AR-15 pattern semi-automatic rifle chambered in 5.56 NATO / .223 Remington. It has a 16-inch threaded barrel with a mid-length gas system, a 15-inch M-LOK handguard, and a Picatinny rail on the black receiver. The rifle ships with a 6-position M4 stock, an A2 grip, and a 30-round magazine. 
 

Key Specifications 

• Brand: One Horse 
• Model: OH-15 
• Caliber: 5.56 NATO / .223 Remington 
• Action: Semi-Automatic 
• Capacity: 30+1 
• Barrel Length: 16 in 
• Barrel Profile: SOCOM 
• Twist Rate: 1:8 
• Gas System: Mid-Length 
• Finish: Black 
• Weight: 7.14 lbs 
   

Detailed Features 

• Threaded 16-inch barrel with 1/2x28 muzzle threads accepts standard muzzle devices 
• Mid-length gas system cycles more smoothly than a carbine-length setup 
• 15-inch M-LOK handguard leaves room to mount lights, grips, and optics 
• 6-position M4 stock and A2 grip let the shooter adjust length of pull 
• Comes with a 30-round magazine ready to shoot out of the box

Owners of budget-tier AR-15 pattern rifles like the OH-15 generally report smooth function once the rifle is broken in, though some note it takes a few range trips before extraction and ejection settle in. The mid-length gas system tends to draw praise for reducing felt recoil and easing follow-up shots compared to shorter carbine-length guns. A handful of owners mention the trigger feels gritty out of the box and benefits from an aftermarket swap.

In terms of handling, the 16-inch barrel and mid-length handguard strike a balance many shooters find comfortable for both range use and home defense, without feeling front-heavy. The adjustable M4 stock lets shooters of different builds get a consistent cheek weld, and the A2 grip is a familiar, no-frills choice some prefer to swap for something more ergonomic.

On value, buyers picking an OH-15 are usually looking for an affordable way into the AR-15 platform, and most feel they got a functional rifle for the price. The M-LOK handguard and standard mil-spec-style furniture mean aftermarket parts and accessories are easy to find and install, which owners appreciate when customizing the build over time.