Dark mode is

Product Unavailable

Unfortunately, the following product is currently unavailable through Rainier Arms.

Aero Precision M5E1 Enhanced Upper Receiver - Black

AR-10 Upper Receiver Group


Aero's state of the art M5E1 platform starts here, with the M5E1 Upper Receiver. The M5E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. Through superior engineering, they have condensed the parts needed to mount a free-floated handguard to a mere 8 screws. Since the handguard mounting surface and upper are of the same forging, not only is it a stronger system, but they are able to make additional lightening cuts to save weight and allow for more efficient cooling.


Ease of installation: Simply insert your barrel assembly into the M5E1 upper, tighten it using the included barrel nut and slide your rail on and tighten the rail screws. Within minutes you have a modular, free-floated rail.



  • M4 Feedramps
  • .2795 takedown pin holes
  • Laser engraved T-marks
  • Comes assembled, with dust cover and forward assist installed
  • M5E1 Specific Details:
  • Handguard mounting platform is forged into the receiver
  • Works with Aero Precision M5 Enhanced Handguards
  • Barrel nut included
  • Torque to 65 ft. lbs. with an armorer's wrench (we recommend a TAPCO® Armorer's Wrench)



  • M5E1 Upper Receiver
  • Port Door and Forward Assist installed
  • Barrel Nut



  • Platform: M5
  • Material: Machined from 7075-T6 forged aluminum
  • Finish: Anodized Black
  • Compatibility: Accepts standard DPMS .308 components
  • Weight: 16.96 oz
  • Barrel Nut Torque: 65 ft-lbs
More Information
Product Type AR-10 Upper Receiver Group
Manufacturer Aero Precision
Color Black
Option AR-10

Product Recommendations

Google Customer Reviews Google Customer Reviews