American-made rifle upper receiver in matte black finish, featuring a rail system and precision craftsmanship for reliability.

Black AR-15 upper receiver showcasing precision engineering and durable materials, designed for reliability and performance.

Black rifle upper receiver featuring a sleek design, rail system, and durable construction for reliability and performance.

Details

Master close-quarters performance with this ultra-compact 7.5″ .300 Blackout Complete Upper Receiver. Featuring a 7.5″ barrel with a 1:7 twist rate, this upper ensures optimal stabilization for both subsonic and supersonic rounds, making it perfect for tactical, suppressed, or AR15 pistol builds. The 7″ M-Lok handguard provides a lightweight, modular platform for mounting accessories, while the nitride-finished bolt carrier group delivers smooth cycling, enhanced durability, and low maintenance. Complete with a charging handle and built to Mil-Spec standards, this upper is ready to pair with any AR15 Mil-Spec lower receiver for a seamless, high-performance setup.

7.5″ .300 Blackout barrel with 1:7 twist for versatile bullet compatibility
7″ M-Lok handguard for secure, customizable accessory attachment
Nitride-finished BCG and charging handle included
Made in the U.S.A
Ready to mount on any Mil-Spec AR15 lower receiver Build your ultimate .300 Blackout pistol—add to cart now!

7.5″ .300 Blackout Complete Upper Receiver – 7″ M-Lok Handguard, Nitride BCG & Charging Handle

SKU: OH-CU06 Categories: Parts, Uppers

UPC: 850078799333

MSRP: Original price was: $315.99.Current price is: $299.99.

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SPECIFICATIONS

Caliber: .300 BLK

Barrel Profile: Medium

Muzzle Thread: 5/8X24

Twist Rate: 1/7

Gas System: Pistol

Material: 4150

Handguard Length: 7 in.

Charging Handle: Standard

Manufacturer: One Horse

Country of Origin: U.S.A.

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