Aero Precision M4E1 Enhanced Upper Receiver

The Aero Precision M4E1 upper is a one-piece design combining the handguard mounting platform with the upper receiver. Through superior engineering, they have condensed the parts needed to mount a free-floated handguard to a mere 8 screws. As the handguard mounting surface and upper receiver are of the same forging, not only is this a stronger system, it allowed for additional lightening cuts to save weight and promote more efficient cooling. Mounting is simple. Insert your barrel assembly into the M4E1 upper, tighten it using the provided barrel nut and wrench, then slide your rail on and tighten the rail screws. Within minutes you have a modular, free-floated rail.

NOTE: This upper receiver is not piston-kit compatible.

Features:
Machined from 7075-T6 forged aluminum, anodized black.
M4 feedramps
.250” takedown pin holes
Laser engraved T-marks
Preassembled with dust cover and forward assist.
Works with Aero Precision handguards but also fits most BAR system handguards.
Barrel nut and wrench are included.
Weight: 10.24oz
Barrel nut torque: 50 ft-lbs
Made in the U.S.A.