Aero Precision M5E1 (.308) Enhanced Upper Receiver

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  • AERO PRECISION Aero Precision M5E1 .308 Enhanced Upper Receiver
  • AERO PRECISION Aero Precision M5E1 .308 Enhanced Upper Receiver
MSRP: $184.99
— You save $15.04
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Aero Precision M5E1 (.308) Enhanced Upper Receiver

The Aero Precision M5E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. Through superior engineering, we 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 we 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 Feed Ramps
  • .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 (recommend Armorer's Wrench)


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

Note: The M5E1 Upper Receiver is specifically designed to be used with the Aero Precision M5 Enhanced Handguards. It will not work with other AR 10/.308 handguards. 

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