AERO PRECISION M5 .308 WIN ASSEMBLED UPPER RCVR NO AUTO SEAR CUT FOR AR15 The M5 .308 Assembled Upper Receiver comes with both the port door and forward assist hardware preinstalled. Forged from 7075-T6 aluminum, this assembled upper is precision machined to accept standard .308 components and is the perfect upper for your big bore build. Match this with our M5 .308 lower receiver for a solid and dependable fit. FEATURES: M4 Feedramps .2795 takedown pin holes Laser engraved T-marks DPMS High Profile (.210) Tang) Includes port door and forward assist SPECS Made In America?: Yes Platform: M5 Material: Ma Mfg: Aero Precision