Out of stock
SKU: 144840
UPC: 815879019738
MPN: AR5CUB3
The Aim Sports AR5CUB3 Complete Upper Assembly is a precision-engineered 5.56x45mm NATO upper receiver built for AR-15 platforms requiring dependable performance across extended duty cycles. Chambered in 5.56 NATO with a 16-inch black nitride barrel, this upper delivers the ballistic velocity and reliability demanded in patrol, training, and tactical applications. The complete assembly arrives ready to marry to a compatible lower receiver, eliminating the need for additional component sourcing.
The barrel's black nitride finish provides corrosion resistance in field conditions—a critical factor for operators working in humid or salt-air environments. The receiver is machined from 7075-T6 aluminum, a hard-anodized military-grade alloy chosen for strength-to-weight ratio and durability under sustained use. The 15-inch M-LOK free-float handguard isolates the barrel from external pressure, maintaining zero consistency shot-to-shot and supporting modular accessory mounting for optics, lights, and tactical systems. At 4.59 lbs, the upper assembly contributes manageable weight to the overall platform, preserving ergonomic handling in extended engagements.
This upper suits patrol officers building duty rifles, range competitors seeking reliable 5.56 platforms, and systems integrators assembling complete AR-15 configurations. The 16-inch barrel length balances velocity performance with portability in vehicles and close-quarters environments. M-LOK compatibility ensures seamless integration with current-generation tactical rails and attachments, providing flexibility as mission requirements evolve.
Complete upper assemblies eliminate assembly variables and reduce build time—a practical advantage for departments standardizing AR platforms or operators requiring rapid rifle configuration in the field.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
