When building a big-bore AR platform, the lower receiver is the foundation that determines fitment, durability, and long-term reliability. Choosing a precisely machined, correctly finished lower saves hours of fitting work and ensures your components interface as intended under real-world use.

AERO PRECISION M5 LOWER RECEIVER is built to give gunsmiths and serious builders a no-compromise starting point for .308 platforms. This stripped lower features mil-spec dimensions and a black hard coat anodized finish, with practical refinements like a threaded rear takedown pin detent hole for a 4-40 set screw and a bolt catch threaded for a screw pin so you can avoid roll pins during assembly. Shop this product

Precision features that matter

The M5 lower uses mil-spec dimensions to ensure correct component interface and repeatable fit with aftermarket parts. Selector markings accept 45, 60, or 90 degree standard safety selectors, and the design eliminates the common gap between receiver and many aftermarket pistol grips. An integrated trigger guard improves strength and profile while the included Nylon-tipped tensioning set screw lets you fine-tune fit without marring the finish. Compatibility with standard DPMS 308 components and magazines makes this lower a flexible choice for builds that use proven parts sets. The listed price for this receiver is $1,349.99, reflecting its precision machining and finish.

Applications and build considerations

Configured for .308-class performance, this lower supports platforms intended for precision shooting, hunting, or patrol-style duty rifles where bigger bore ballistics are required. .308-based ARs deliver longer effective range and heavier projectile energy than intermediate calibers, so pairing this lower with the right upper, barrel, and stock is critical. Remember: the M5 is stripped — you will need a lower parts kit, buffer assembly, and stock of your choosing to complete a functional rifle. View product details and pricing

Why choose Aero Precision

Aero Precision is a recognized name for consistency and tight tolerances in the industry; the M5 lower extends that reputation into DPMS-compatible .308 builds. For builders focused on fit, durability, and straightforward assembly, this lower removes many common fitment headaches and lets you focus on component selection and tuning.

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