One Horse OH15, Mil-Spec Buffer, Complete Lower

The One Horse OH15 Complete Lower is a ready-to-run AR15 lower receiver built for shooters who want dependable performance without the hassle of assembly. Fully assembled and function-tested at the factory, this complete lower is built on a forged 7075-T6 aluminum receiver with a durable hardcoat anodized finish. Designed to pair seamlessly with any Mil-Spec upper, it delivers a true plug-and-play foundation for your next AR build, whether it’s for duty use, range training, or a custom rifle project. What sets the OH15 Complete Lower apart is its no-compromise, Mil-Spec approach. Every component—from the buffer system to the fire control group—is installed and tested to ensure reliable operation right out of the box. The Mil-Spec buffer tube and standard M4 adjustable stock provide proven durability and compatibility, while the crisp single-stage trigger offers a clean, predictable break. With all small parts properly installed, this lower eliminates guesswork and saves valuable build time, making it ideal for both first-time builders and experienced AR enthusiasts.

Specifications:

• Manufacturer: One Horse
• Model: OH15
• Platform: AR15
• Receiver Material: Forged 7075-T6 aluminum
• Finish: Hardcoat anodized
• Buffer System: Mil-Spec buffer tube assembly
• Stock: Standard M4 adjustable stock
• Trigger: Single-stage Mil-Spec trigger
• Grip: A2-style grip
• Compatibility: Mil-Spec AR15 uppers
• Condition: Complete, fully assembled, and function-tested