Aero Precision M4E1 Upper Receiver Black

The 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, precision machined to work with all mil-spec AR15 parts and includes the port door and forward assist pre-installed. 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 Includes threaded forward assist roll pin Includes port door and forward assist Includes: M4E1 Threaded Upper Receiver in Anodized Black Port Door and Forward Assist installed