ONE OH-CU05 10.5" 300 Blackout Complete Upper

ONE OH-CU05 Complete Upper Receiver

The ONE OH-CU05 represents a practical solution for shooters seeking a compact, complete upper assembly in 300 Blackout. This 10.5" barreled upper delivers the ballistic advantages of the 300 Blackout cartridge in a configuration well-suited to shorter sight radii and close-quarters applications.

Key Features

• Caliber: 300 Blackout
• Barrel Length: 10.5"
• Complete Assembly: Includes barrel, bolt carrier group, and charging handle—ready to mate with a compatible AR-15 lower receiver
• Compact Profile: Ideal for shooters prioritizing maneuverability and ease of handling

Performance Characteristics

The 300 Blackout cartridge excels with both supersonic and subsonic ammunition. The 10.5" barrel length provides a practical balance between velocity and portability, making this upper suitable for home defense, tactical training, and recreational shooting.

Installation

This complete upper receiver installs directly onto any standard AR-15 lower receiver. No gunsmithing required—simply align and secure using the takedown pin.

Versatility

The 300 Blackout platform offers flexibility for shooters exploring different ammunition loads and configurations. Whether you're running supersonic rounds for velocity or subsonic ammunition for sound suppression, this upper delivers reliable performance.