Aero Precision M4E1 Enhanced AR-15 Upper Receiver with Forward Assist

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Enhanced M4E1 Upper with Internal Barrel Nut

The Aero M4E1 Enhanced Upper has a unique design and core function that separates it from standard AR-15 uppers. Instead of the typical threading for a barrel nut, the enhanced upper has a built-in assembly to support Aero Precision’s Enhanced Handguards. The internal steel barrel nut supports the barrel exclusively – effectively eliminating deflection when mounting laser modules to the handguard.

This upper receiver features the same enhanced body profile as the threaded M4E1 Upper Receiver, so it matches with M4E1 lowers. It is forged from 7075-T6 Aluminum, precision machined to work with mil-spec AR15 parts, and includes the port door and forward assist pre-installed.

Note: This upper receiver will not work with standard handguards. Use Aero Precision Enhanced or Quantum series handguards only.

Features

M4 Feedramps
.250 takedown pin holes
Comes assembled, with dust cover and forward assist installed

M4E1 Specific Details:

Handguard mounting platform is forged into the receiver
Compatible with Aero Precision Enhanced and Quantum Series handguards but also fits most BAR-system handguards
Barrel nut and wrench are included
These uppers are not piston-kit compatible
Will support barrels with a diameter up to 1″

Includes:

AR15 M4E1 Enhanced Upper Receiver
Port Door and Forward Assist installed
Barrel nut
Barrel nut wrench

Specifications:

Platform: AR15
Material: Machined from 7075-T6 forged aluminum
Finish: Anodized Black, Gold, Purple, Silver/Clear, or Magpul Flat Dark Earth Cerakote
Compatibility: Works with standard AR15/M16 components
Weight(s): 12.4 oz
Barrel Nut Torque – 55 ft-lbs
Made In America: Yes

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Aero Precision Warranty

If for any reason you have a warranty issue with one of our products, please contact us at 253-272-8188.

Please describe your situation, include your name and order number or transaction id. One of our technical specialists will then review your claim and contact you within 3-5 business days.

If you have images to send, please email them to support@aeroprecisionusa.com

Damaged Items

In regards to claims dealing with damaged or blemished products, we ask that you create a Help Desk Ticket on your My Account page. If you don’t have an account with us, please go to the Contact Us page and fill out the form for review within 72 hours upon receiving the shipment.

If you have images to send, please email them to support@aeroprecisionusa.com