Aim Sports AR5CUB8 Assembly 5.56x45mm NATO 10.50" Black Nitride Barrel 7075-T6 Aluminum Black Anodized Receiver 10" M-LOK Handguard for AR-15

The Aim Sports AR5CUB8 Assembly 5.56x45mm NATO upper receiver combines a compact 10.50" black nitride barrel with a 7075-T6 aluminum receiver, purpose-built for shooters who demand reliability in close-quarters and defensive applications. This complete upper assembly serves law enforcement, tactical instructors, and civilian operators who require a short-barreled rifle platform capable of delivering consistent performance without the regulatory complexity of a full-length system. The compact profile makes it ideal for vehicle-mounted operations, room-clearing scenarios, or shooters prioritizing maneuverability in confined spaces.

Built from 7075-T6 aluminum—the same material standard in military platforms—the receiver provides superior strength-to-weight ratio while maintaining tight tolerances essential for precision. The 10.50" black nitride barrel delivers velocity optimization for the 5.56 NATO round in a package that reduces point-of-aim shift compared to longer barrels, critical for operators engaging multiple targets in dynamic environments. The 10" M-LOK handguard integrates seamlessly with modern accessory ecosystems, offering ample real estate for mounting lights, lasers, and vertical grips while maintaining a slim profile. At 3.9 lbs, this upper receiver assembly balances durability with the lightweight characteristics necessary for extended patrol or duty carry.

This assembly pairs directly with standard AR-15 lower receivers, making installation straightforward for anyone with basic firearm maintenance knowledge. Law enforcement agencies, private security contractors, and home defense enthusiasts benefit from the compact ergonomics and proven 5.56 NATO reliability. The M-LOK handguard design eliminates picatinny rail weight while supporting industry-standard tactical attachments—a configuration validated across multiple operational theaters. Verify local regulations regarding barrel length and overall configuration before assembly, as restrictions vary by jurisdiction.