Aero Precision M4E1 Threaded Assembled Upper Receiver for AR-15 - Black (Color: Black)

Threaded High-Quality Upper Receiver To Make Your AR Build Stand Out The Aero Precision M4E1 Threaded Assembled Upper Receiver is a bold new offering from Aero Precision that features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as the [...]