The foundation of this M5E1 rifle is an American-made Aero Precision M5 forged 7075-T6 aluminum upper and lower receiver set treated with Magpul's FDE Cerakote finish. The partially assembled flat ...

If you’re not that into Modern Sporting Rifles, you may have never heard of Aero Precision ... and the parts and complete lower and upper receivers they manufacture for gas-operated guns ...

I’ll detail the builds below, but one was a from-scratch build using an Aero Precision builder’s set, which includes the upper and lower receivers and handguard. I built the other by pirating a very ...