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If you're looking for a complete lower that shows up ready to work, this One Horse AR15 Complete Lower Receiver skips the assembly hassle. Everything arrives function-tested and bolted together so you can pair it with your upper and get to the range.
This lower starts with 7075-T6 forged aluminum, which gives you the strength advantage of heavier-duty alloy without unnecessary weight. Forging creates denser metal with aligned grain structure, making it genuinely tougher than billet or cast alternatives at a more practical price point. The hardcoat anodize finish protects the bare aluminum underneath and stands up to regular use without looking beat up after a season.
Every component installed on this lower meets Mil-Spec standards. That means the Mil-Spec buffer tube, M4 adjustable stock, crisp single-stage trigger, and A2 grip will mate cleanly with standard AR-15 parts without hunting for adapters or worrying about fit issues. All the small parts, pins, springs, and detents come pre-installed and verified.
The 6-position M4 stock adjusts to your preferred length of pull, and the single-stage trigger breaks cleanly without creep. The A2 grip fits standard AR-15 ergonomics, so if you want to swap it later for something with better texture or angle, you've got options. This lower works equally well as the foundation for a rifle or pistol build, and it's marked for multi-caliber use so you can build in 5.56 NATO, .223, or other common AR platforms.
One Horse builds every component with U.S.-sourced materials and manufactures everything domestically. No imported shortcuts, no questions about where parts originated. The build quality shows that commitment to standards at every step, making this lower a solid foundation whether you're running a lightweight precision gun, a duty rifle, or a range toy.
This lower is built to Mil-Spec standards and will accept any standard Mil-Spec AR-15 upper receiver. The interface dimensions are held to spec, so you shouldn't run into fit issues with quality uppers from any manufacturer.
Absolutely. The M4 stock slides onto the standard Mil-Spec buffer tube, and the A2 grip uses a standard pivot pin. Both come off easily if you want to run different furniture that suits your shooting style or comfort.
This lower comes with a single-stage Mil-Spec trigger. If you want a different trigger with more customization (adjustable pull weight, shorter reset, etc.), you can swap it by removing the trigger pins and dropping in a new trigger group.
7075-T6 forged aluminum is nearly twice as strong as the 6061-T6 alloy used in many budget lowers, and forging creates a denser, more aligned grain structure that resists stress better. The hardcoat anodize finish protects it from corrosion, so you're getting durability and longevity.
Yes, every lower comes fully assembled and function-tested before it ships. All components are installed, verified, and ready to go. Once you bolt on your upper, you're building a rifle.
This multi-caliber lower works for both platforms. The markings support standard AR-15 builds in common calibers, and you can configure it as a pistol or rifle depending on your upper, barrel length, and local regulations.
| UPC | 850078799395 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OH-CL01 |
| Shipping Weight | 2.3 |
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