Aero Precision M4E1 Threaded Stripped AR-15 Upper - No Forward Assist - Anodized Black

Manufactured by Aero Precision
SKU: APAR712201C
MPN: APAR712201C
Manufactured by Aero Precision
8 Reviews
$94.99 $134.99

In Stock

Orders of non-FFL items will ship same day if ordered 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 Upper Receiver 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
FinishHardcoat Anodized
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

8 reviews

  • 3 stars
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  • 1 star
  • 0 reviews

It's an upper

by -

Decided to go with the slick side for an ultra-light build. I've always liked the fit and finish of the M4E1 Aero products, so it was a natural choice. This upper met my expectations. Finish was perfect and it fit tight with my ballistics advantage lower receiver. Solid upper from a solid company.

Aero Precision upper receiver


I've purchased Aero Precision uppers / lowers to build 4-5 MSR's over the past few years. I built a .22LR rifle with a dedicated CMMG barrel and BCG with an Aero Precision M4E1 upper without the forward assist. Looks and Works beautifully. Aero Precision makes a great affordable product. Highly recommend.

Aero Quality, Primary Arms efficiency

by -

This is my 3rd Aero purchased from Primary Arms. The Aero quality is consistent and the pricing is always exceptional from Primary Arms.

Aero always comes through

by -

I’ve been building custom ARs for years and Aero is always my go-to for high quality, excellent fit and finish. Best balance of quality and cost on the market.


by -

It feels and looks great to not have a forward assist. Functions just fine. I am not one that thinks you need the best high end upper - I dont know the difference when shooting. It is solid. I would buy again no problem.

nice for lefties

by -

great quality as always from this company

Ok Uppers

by -

I mainly use these because they match the m4e1 lowers. my only complaint about these are that they are hit and miss for taking aftermarket dust covers. This one without the F/A worked with a Strike Industries enhanced one, but the CMMG 22lr BCG I had in it didnt. I have 2 other m4e1 uppers (with F/As) that a Strike Industries and a Magpul poly dust cover wouldn't work on.

Standard AeroPrecision

by -

Quality upper receiver that matched perfectly with a lower receiver produced by a local FFL. AeroPrecision continues to provide quality parts without breaking the bank.