The AR15 Assembled Upper Receiver comes with the port door already installed. This specific model does not have forward assist provisions. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil-spec M16/M4 specifications and features M4 feedramps.
.250 takedown pin holes
No forward assist provisions
Port door installed
AR15 Assembled Upper Receiver Without Forward Assist in FDE Cerakote