Aero Precision AR-15 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. Match this upper with one of our AR15 lower receivers for a solid and dependable fit.  
 
Features: 
M4 Feedramps 
.250 Takedown Pin Holes 
Laser engraved T-Marks 
Includes Port Door and Forward Assist 
 
Includes: 
AR-15 Assembled Upper Receiver in Anodized Black