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 is a complete 5.56x45mm NATO upper receiver built for operators and shooters who require a proven, field-ready platform. Featuring a 10.50" black nitride barrel, this assembly delivers the velocity and accuracy characteristic of mid-length AR-15 configurations while maintaining a compact profile suitable for confined spaces, vehicle operations, and close-quarters applications. The 7075-T6 aluminum receiver—black anodized for corrosion resistance—combines lightweight construction with the structural rigidity needed to handle duty-cycle demands.

The 10" M-LOK handguard provides versatile mounting real estate for tactical lights, pressure switches, vertical grips, and optic accessories without adding unnecessary weight or length. Black nitride barrel coating resists corrosion in variable humidity and salt-air environments—critical for field reliability over extended service life. At 3.9 lbs, this upper assembly integrates smoothly into both carbine and rifle configurations, enabling quick platform transitions without significant balance or ergonomic penalties. The 5.56x45mm NATO chamber ensures compatibility with standard military and commercial ammunition, making logistics straightforward in patrol, training, and multi-shooter environments.

This assembly is engineered for law enforcement, military personnel, and serious civilian shooters building a semi-automatic rifle platform. It suits shooters requiring a no-nonsense upper receiver that prioritizes durability and modularity over unnecessary features. The Aim Sports AR5CUB8 fits standard AR-15 lower receivers and integrates with mil-spec charging handles and bolt carrier groups, making it a straightforward drop-in component for those assembling or upgrading an existing platform.