Aero Precision M4E1 Threaded Stripped Upper- No Forward Assist - FDE Cerakote

Manufactured by Aero Precision
SKU: APAR712202C
MPN: APAR712202C
Manufactured by Aero Precision
3 Reviews

In Stock

Orders of non-FFL items will ship same-day if placed before 3:30pm CST (M-F). FFL orders will ship within 5 business days if transfer details are provided.

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The Aero Precision M4E1 Threaded AR-15 Stripped Upper Receiver without forward assist stands apart from standard MIL-SPEC upper receivers, featuring an angular machined design. With the same enhanced body profile as the Aero M4E1 Enhanced Upper Receiver, this upper is threaded to accept a standard AR-15 barrel nut. Forged from 7075-T6 aluminum and precision machined to work with all Mil-Spec AR-15 parts. This model removes the forward assist to minimize weight.

NOTE: Port door not included.

  • Picatinny profile blends seamlessly with Aero Enhanced and ATLAS series handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Machined from 7075-T6 forged aluminum
  • Anodized Black
  • No forward assist
  • Compatible with standard AR-15/M16 components
  • Barrel nut torque - 50 ft-lbs

The M4E1 Threaded Upper Receiver is designed to pair perfectly with the Aero M4E1 Lower Receiver, offering a billet look without the billet price.

Aero Precision is known for superior engineering and machining. They push the boundaries of manufacturing and challenge the status quo by constantly looking for new ways to develop and evolve.
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BrandAero Precision
ColorFlat Dark Earth
Feed RampsM4
Forward AssistIncompatible
Port DoorAccepts Standard Port Cover
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

3 reviews

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No disappointments

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Quality machining, meets up with AP M4E1 lower perfectly. Not sure why they included the nylon tipped tension screw, no jiggle… none. Barrel nut screws tight and lines up perfectly. BCG slides in tight without any resistance or gravelly friction. Holds the charging handle tight, again, no jiggle. Light weight, perfect finish with the cerakote. Worth every ¢. Thanks PA for the hook up, my 300bo pistol is looking/feeling smexy.

Primary Arms ROCKS! Aero Precision is Awesome

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To Whom this is of interests:
This IS my 3rd: M4E1 SLICK Sided Upper, of which the 1st "2" I bought straight from Aero Precision. The 3rd, "M4E1 Upper" I found here on Sale via Primary Arms.. I had forgotten I bought the FDE, Flat Dark Earth Cerakote and I've got to say, it's an Awesome finish!

I choose the "M4E1 Slick Sided Upper" over the "AR15 Slick Sided Upper" because to Me, the M4 Upper looks like it is Stronger than the AR15 Upper!

Lastly, I Dislike/Loath the "Forward Assist" So Much, I got rid of all my AR15 Uppers that >had<LOL<>Get it?< Had a Forward Assist, to which one of them was even a Seekins NX15.
So now, ALL My AR15s are rebuilt as: Jim Sullivan & Eugene Stoner Desighed, NO Forward Assist!


by -

This is my 3rd Aero M4E1 Slick Upper, 1st 1 from PA., the other 2 I bought directly from AERO... I despise/Loath the "Forward assist" and I have slowly switched out my AR15 Uppers to make them as Jim Sullivan & Eugene Stoner intended!
I was super surprised when I opened my box from PA., as I had forgotten I ordered the FDE, it's Awesome!
I have some standard Mil spec AR15 UPPERS if anyone wants to buy them? LOL

Peace WannaBee