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Aero Precision APAR600201AC M4E1 Enhanced Upper Receiver 223 Remington/5.56 NATO Black Hardcoat Anodzied

Aero Precision APAR600201AC M4E1 Enhanced Upper Receiver 223 Remington/5.56 NATO Black Hardcoat Anodzied

Product Features & Specifications Aero Precision APAR600201AC M4E1 Enhanced Upper Receiver 223 Remington/5.56 NATO Black Hardcoat Anodzied The M4E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. It is machined from 7075-T6 aluminum with, M4