One Horse 16″ .300 BLK SOCOM Pistol 1:7 M-LOK Complete Upper
The One Horse 16″ .300 BLK complete upper is built for shooters who want a dependable, ready-to-run upper for a Mil-Spec AR-15 lower. Its 16-inch barrel, 1:7 twist rate, and SOCOM profile make it a practical choice for customers looking for a solid .300 Blackout setup with broad ammunition compatibility and consistent on-rifle performance.
This upper features a 15-inch free-float M-LOK handguard that gives the rifle a long, streamlined profile while providing ample space for accessories. The free-float design also helps support barrel stability, while the full-length Picatinny top rail leaves ample room for optics and other sighting equipment.
A nitride-finished bolt carrier group and charging handle are included, giving the upper a complete, easy-to-install package. It also uses a clamp-on handguard system with a steel barrel nut and screws, a 5/8×24 threaded muzzle, and an A2 muzzle device. Built in the U.S.A. and listed under One Horse SKU OH-CU04, this upper is a strong fit for customers building a modular .300 Blackout rifle with straightforward compatibility.
Features
- 16-inch .300 BLK barrel
- 1:7 twist rate for versatile bullet stabilization
- SOCOM barrel profile
- 15-inch free-float M-LOK handguard
- Full-length Picatinny top rail
- Nitride bolt carrier group included
- Charging handle included
- Clamp-on handguard system with steel barrel nut and screws
- Ready to pair with Mil-Spec AR-15 lower receivers
- Made in the U.S.A.
Specifications
- Caliber: .300 BLK
- Barrel Length: 16 in.
- Barrel Profile: SOCOM
- Muzzle Thread: 5/8X24
- Twist Rate: 1/7
- Gas System: Pistol
- Muzzle Device: A2
- Material: 4150
- Handguard Length: 15 in.
- Manufacturer: One Horse
- Country of Origin: U.S.A.








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