APAR700201AC Aero AR15 M4E1 Assembled Upper Receiver Anodized Bk



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The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum, precision machined to work with all mil-spec AR15 parts and includes the port door and forward assist pre-installed.

The M4E1 Threaded Upper Receiver is designed to pair perfectly with our new M4E1 Lower Receiver, giving you a billet looking receiver set at a fraction of the billet price.


  • New enhanced forging that gives the upper receiver a “billet look”
  • New picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes threaded forward assist roll pin
  • Includes port door and forward assist


  • M4E1 Threaded Upper Receiver in Anodized Black
  • Port Door and Forward Assist installed
Made In America Yes
Platform AR15
Material Machined from 7075-T6 forged aluminum
Finish Anodized
Compatibility Works with standard AR15/M16 components
Weight (oz) 8.65 oz
Other Barrel Nut Torque – 50 ft-lbs

Additional information

Weight 1.00 lbs
Dimensions 8.60 × 3.30 × 2.60 in
Part Number

Manufacturer Name