The Aero Precision M4E1 assembled upper comes fully assembled complete with a forward assist and dust cover in an angular design. It is compatible with all AR-15 mils-spec parts and accepts a standard AR-15 barrel nut. Complete your build today at the best price online from GrabAGun!
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M4E1 Assembled Upper
M4E1 Assembled Upper Features The M4E1 Threaded Upper Receiver 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 our 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 M4E1 Assembled Upper Specifications Works with standard AR15 components Perfect for your custom AR15 build M4 Feedramps Includes threaded forward assist roll pin