The Aero Precision M4E1 Enhanced Barreled AR-15 Upper Receiver is a perfect addition to your AR-15 build. Forged from 7075-T6 aluminum, the receiver is precision machined to M4E1 specs and finished with a hardcoat anodized black finish. The integrated Picatinny rail top allows for easy mounting of optics while the laser engraved T-marks provide a consistent reference point for mounting accessories. The 18” 5.56 barrel is constructed from 4150 chrome moly vanadium steel and features a 1:8 twist rate to deliver exceptional accuracy and reliability. TheMil-Spec phosphate coating provides superior corrosion resistance and durability.
The Aero Precision M4E1 Enhanced Barreled AR-15 Upper is the perfect choice for your next build. This upper features a 18″ 41V50 chrome moly vanadium steel barrel with a Nitride finish and a 1:7 twist rate. It also has an M4 feed ramp barrel extension and is magnetic particle inspected as well as high pressure tested. A standard A2 flash hider is attached to the muzzle.