One Horse 7.5″ .300 BLK SOCOM Pistol 1:7 M-LOK Complete Upper
The One Horse 7.5″ .300 BLK SOCOM Pistol 1:7 M-LOK Complete Upper is built for shooters who want a compact, maneuverable upper for close-range work, defensive setups, and specialized AR-15 pistol builds. Its 7.5-inch .300 Blackout barrel uses a 1:7 twist rate to help stabilize a wide range of bullet weights, making it a strong fit for both subsonic and supersonic ammunition. One Horse positions this upper as a close-quarters option that is especially well-suited for tactical and suppressed applications.
The upper includes a 7-inch M-Lok handguard that keeps the profile compact while still giving the user room to mount accessories where needed. A nitride-finished bolt carrier group is included for smoother cycling, improved surface durability, and easier maintenance, and the package also includes a standard charging handle, so the upper is ready to pair with a compatible lower receiver. The product page states that it is built to Mil-Spec standards and designed to mount on any AR-15 Mil-Spec lower receiver.
Features
- 7.5-inch .300 Blackout barrel
- 1:7 twist rate for broad bullet compatibility
- 7-inch M-Lok handguard for accessory mounting
- Nitride-finished bolt carrier group included
- Standard charging handle included
- Built to Mil-Spec standards
- Designed for AR-15 Mil-Spec lower receivers
- Compact format suited for close-quarters and suppressed builds
- Made in the USA
Specifications
- Caliber: .300 BLK
- Barrel Length: 7.5 inches
- Barrel Profile: Medium
- Twist Rate: 1:7
- Gas System: Pistol
- Barrel Material: 4150
- Handguard Length: 7 inches
- Handguard Interface: M-Lok
- Muzzle Thread: 5/8×24
- Bolt Carrier Group: Nitride-finished, included
- Charging Handle: Standard, included
- Manufacturer: One Horse
- Country of Origin: U.S.A.








Reviews
There are no reviews yet.