The AR15 Assembled Upper Receiver comes with the port door and forward assist already installed. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil- spec M16/M4 specifications and features M4 feedramps. 

Features:

• M4 Feedramps
• .250 takedown pin holes
• Port door and forward assist installed
• AR15 Assembled Upper Receiver in FDE Cerakote