Aero Precision M4E1 Upper Receiver AR-15 5.56mm Black

Aero Precision M4E1 Standard Upper Receiver features an 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 M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum and precision machined to work with all mil-spec AR15 parts. Features: Enhanced forging that gives the upper receiver a "billet look" Picatinny profile that blends seamlessly with Enhanced and ATLAS Series Handguards M4 Feedramps .250 takedown pin holes