Aero Precision APRA600005C MOD 4 6061-T6 Aluminum

The Aero Precision APRA600005C MOD 4 6061-T6 Aluminum receiver set represents the foundation of a reliable, precision rifle platform trusted by law enforcement and military units for tactical operations and competition shooting. This forged aluminum receiver assembly is engineered for shooters who demand repeatable accuracy and durability in demanding field conditions. Whether building a duty rifle, precision carbine, or competition platform, the MOD 4 design provides the structural integrity and dimensional consistency required for sub-MOA performance.

Manufactured from 6061-T6 aluminum alloy, the APRA600005C delivers superior strength-to-weight characteristics with a total weight of 1.16 pounds, keeping overall rifle mass in the 7–8 pound range depending on barrel and furniture selection. The MOD 4 iteration features precision-machined rails, optimized feed geometry, and tight tolerances that ensure reliable function across thousands of rounds. The compact 3.1 x 3.1 inch cross-section with 14.7 inch length accommodates standard AR-pattern components while maintaining the ergonomic controls and modularity that field operators require. Aero Precision's quality-control standards ensure dimensional accuracy that eliminates function issues caused by receiver-to-component fit variance.

This receiver set is ideal for builders constructing 5.56 NATO or .223 Remington rifles, as well as those transitioning to 300 Blackout or 6.5 Grendel platforms using standard AR tooling. Law enforcement armory personnel and military gunsmiths rely on Aero Precision receivers for replacement builds and depot-level maintenance due to their consistent fit with mil-spec upper receivers and bolt carriers. Installation requires standard receiver assembly tools and basic gunsmithing knowledge; compatibility extends across all mil-spec charging handles, bolt carrier groups, and trigger groups. The MOD 4 design integrates seamlessly with both rail systems and traditional handguards, making it the practical choice for duty rifles, training carbines, and precision builds.