Aero Precision M4E1 Enhanced Upper Receiver, 5.56 NATO, Black Anodized - APAR600201AC

This Aero Precision M4E1 Enhanced upper receiver is a semi-complete assembly compatible with AR-15 platforms and chambered in 5.56x45mm NATO. Constructed from 7075-T6 aluminum with black hard coat anodized finish, it features a free-floating handguard design and is optic-ready without iron sights. The receiver measures 10.5" in length with a 3.6" width and 2.9" height.