Aero Precision APRA600006C MOD 4 6061-T6 Aluminum

The Aero Precision APRA600006C MOD 4 6061-T6 Aluminum upper receiver is a precision-engineered component for AR-15 builds demanding durability and exacting tolerances. Machined from 6061-T6 aluminum, this upper receiver delivers the strength-to-weight ratio critical for sustained operational performance while maintaining the dimensional consistency required for flawless function across a wide range of shooting conditions and duty cycles.

The MOD 4 platform represents Aero Precision's commitment to mil-spec compatibility. The 6061-T6 aluminum alloy provides superior corrosion resistance compared to standard aluminum receivers, making it suitable for duty in varied environments—from arid ranges to humid coastal areas. At 1.08 lbs, the upper receiver contributes minimal weight to the overall rifle system without compromising structural rigidity. Precision CNC machining ensures consistent bore alignment and rail mounting surfaces, critical factors for accuracy and reliability in both tactical and competitive applications.

This upper receiver serves operators building duty rifles, law enforcement carbines, and precision sporting platforms where component integrity directly impacts mission readiness. Whether assembling a modular system for patrol work, upgrading an existing rifle, or constructing a specialized build, the MOD 4 upper receiver provides a dimensionally stable foundation. The design accepts standard AR-15 bolt carrier groups and charging handles, enabling straightforward integration with existing inventory and logistical supply chains.

Aero Precision upper receivers are widely recognized in military, law enforcement, and civilian markets for consistent quality control and repeatable performance. The MOD 4 designation indicates compatibility with modern AR-platform standards, ensuring hassle-free assembly with quality lower receivers and matched bolt carrier groups from reputable manufacturers.