Aero Precision M4E1 Upper | 5.56 NATO | APAR700201C

The Aero Precision M4E1 threaded stripped upper is a mil-spec compatible AR-15 upper receiver forged from 7075-T6 aluminum and finished in black hardcoat anodize. It is precision machined to accept a standard AR-15 barrel nut and to work with mil-spec AR-15 parts. The M4E1 features a Picatinny top rail, M4 feedramps and .250″ takedown pin holes for straightforward parts integration. This stripped upper does not include a dust cover, forward assist, charging handle, barrel, handguard, gas components, or bolt carrier group.

Product Specifications

• The manufacturer is Aero Precision.
• The model is the M4E1 Threaded Upper Receiver.
• The manufacturer part number is APAR700201C.
• The cartridge / caliber is listed as .223 Rem / 5.56 NATO.
• The receiver material is 7075-T6 aluminum.
• The finish is black hardcoat anodized.
• The product type is Stripped (upper receiver only).
• The top rail profile is Picatinny.
• The feedramps are M4 feedramps.
• The takedown pin holes are .250 inch.
• This receiver is designed to fit AR-15 platforms.
• The listed weight is 6.90 oz.
• The package quantity is 1 unit per box.
• The sights are listed as None, optic ready.
• The UPC is 815421023756.

The M4E1 threaded upper is intended for builders and hobbyists assembling AR-15 style rifles who require a forged, mil-spec compatible receiver with a Picatinny rail and M4 feedramps. Its forged 7075-T6 construction and hardcoat anodized finish provide a durable platform for optics and modern accessories. Use this upper for precision-oriented builds or general-purpose AR-15 assemblies where a threaded receiver and full-length rail profile are desired.