M5E1 Enhanced Upper Receiver - Anodized Black

Aero Precision M5E1 Enhanced Upper Receiver - Anodized Black

M5E1 Enhanced Upper Receiver - Anodized Black Product Sku: APAR308504AC

Our 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, 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 Feedramps
  • .2795 takedown pin holes
  • Lazer 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 a standard AR15 Armorer’s Wrench


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

Please Note - - The M5E1 Upper Receiver is specifically designed to be used with our M5 Enhanced Handguards. It will not work with other AR10/308 handguards.

Made In America? Yes
Platform M5
Material Machined from 7075-T6 forged aluminum
Finish Anodized Black
Compatibility Accepts standard DPMS .308 components
Weight(s) 16.96 oz
Other Barrel Nut Torque - 65 ft-lbs

Customer Reviews

4 Item(s)

Easy Peasy Review by Lowell
Built a 308 with the 15 in Black Quad Rail.
I don't know how, but I did something during rifle assembly and the dust cover will not stay closed.
Order extra screw's for the hand guard, I over torqued mine and stripped one, so obviously I had to repair it.
Time to go back to the range and sight in a new scope. (Posted on 5/27/2018)
assemble correctly Review by Eric
I'm glad I called the tech line. I thought that I was not timing the nut correctly. I was told to make sure the nut is 65ft lbs. If the "tooth" from the nut obstructs the gas tube hole file it off DO NOT OVER TORQUE YOU WILL DAMAGE YOUR UPPER. I would like to thank Jonathan for all of his help! (Posted on 4/20/2018)
Can not time barrel nut at 65lbs torque. Review by William
I bought this upper from TomsTactical. Everything looked good but for some reason Aero used a barrel nut that has to be timed to the gas tube hole. The website states 65ft lbs torque. I used every bit of strength I could muster to just get to the nearest alignment. I'm sure I did some damage so I tossed it. I will now abandon this 308 build. What was wrong with the M4E1 type barrel nut Aero?? Why?? (Posted on 3/13/2018)
Excellent uppers Review by Joseph
Built an excellent rifle with this part. Very accurate and smooth operation. (Posted on 8/6/2017)

4 Item(s)

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