Aero Precision built its reputation selling stripped M5 lowers and upper receivers to AR-10 builders — the M5 complete rifle is what happens when you put all those parts together in one box. The specs reflect that builder heritage: 4150 CMV steel barrel with QPQ nitride, 9310 steel bolt carrier group, 7075-T6 aluminum receivers with hard coat anodizing, and an M-LOK free-float handguard. The barrel is 16", threaded 5/8x24, with an A2 birdcage flash hider. At 173.6 oz (10.85 lbs), it is the heaviest rifle in this group — the S&W M&P 10 Sport OR is 45.6 oz lighter. The weight comes from the full-featured build: heavier barrel profile, M-LOK handguard with more material than minimum designs, and the 9310 steel BCG that Aero uses for its known strength properties.

The M5 is a DPMS-pattern platform. The upper and lower accept other DPMS-compatible components, SR-25-pattern magazines feed it, and any standard AR-pattern fire control group will drop into the lower. The trigger is mil-spec as shipped — no published pull weight, and community consensus is that it is standard mil-spec character. This is not a criticism; the platform is designed to be upgraded, and the build quality of the receiver set means you are buying the best foundation available and choosing your own components on top. The Magpul MOE grip and adjustable stock are functional, and the ambi safety selector is included.

Where the Aero M5 is the better choice than a DPMS GII or Ruger SFAR is when you want a complete rifle with the same receivers you would buy for a custom build. The parts ecosystem around the DPMS-pattern M5 is larger than any proprietary AR-10 design, and Aero's receiver tolerances are tight enough that most builders use them as the reference standard for .308 AR-10 builds. Buy the M5 complete rifle if you want a DPMS-pattern AR-10 from a builder whose receivers ship with consistent fit and an established upgrade path that does not require starting over.