Aero Precision M4E1 16″ Carbine Upper Receiver, Complete

sku: APAR700705M6


In stock

In stock


This Aero Precision M4E1 16″ Carbine Upper Receiver, Complete comes completely assembled with 16” 5.56 barrel & the ATLAS R-ONE M-LOK handguard.

This barreled upper receiver group does not include a BCG or charging handle.

The upper receiver is fully assembled with forward assist &  dust cover.

The M4E1 threaded upper is made from forged 7075-T6 aluminum with a billet machined look that matches the lower & handguard. The ATLAS R-ONE free float handguard is 15” and features a 1.3” inner diameter that surrounds the low-profile gas block & carbine-length gas tube.


  • M4E1 threaded upper receiver
  • Forged 7075-T6 aluminum
  • Assembled forward assist & dust cover
  • Hard-coat anodized
  • 16” 5.56 NATO barrel
  • Machined from Chrome Moly Vanadium
  • Carbine-length gas system
  • 1:7 twist rate
  • Threaded 1/2×28
  • A2 flash hider
  • Salt Bath Nitride finished

Additional information

Weight 48 oz


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