Aero Precision M4E1 Threaded Upper | 5.56 NATO | APAR700201AC

The Aero Precision M4E1 Threaded Upper Receiver is an assembled AR-15 upper forged from 7075-T6 aluminum and finished in anodized black. It is threaded to accept a standard AR-15 barrel nut and ships with the port door and forward assist pre-installed. The upper uses an angular machined profile and M4 feedramps for reliable feeding with mil-spec parts. Common applications include precision target shooting and competition/upgrades for sporting use.

Product Specifications

• The manufacturer is Aero Precision.
• The model is M4E1 Threaded Upper Receiver (Assembled).
• The manufacturer part number is APAR700201AC.
• The UPC is 815421020977.
• The finish is Anodized Black.
• The color is Black.
• The fit is specified as AR-15.
• The cartridge compatibility is listed as .223 REM/5.56 NATO.
• The receiver is forged from 7075-T6 Aluminum.
• The upper includes port door and forward assist installed.
• The upper features M4 feedramps.
• The takedown pin holes measure .250.
• The upper includes a threaded forward assist roll pin.
• The upper has laser engraved T-marks.
• The units per box is 1.

This assembled M4E1 upper provides a durable, mil-spec compatible platform with a billet-inspired profile for builders and competitors who value fit and finish. Its forged construction and pre-installed components simplify assembly while offering compatibility with a wide range of mil-spec barrels, handguards, and lower receivers for range and competitive shooting applications.