Aero Precision M4E1 Enhanced Slick Side AR-15 Upper Receiver
Slick Side M4E1 Upper with Internal Barrel Nut
This Aero M4E1 Enhanced Upper eliminates the forward assist, and features a new method for supporting Aero’s Enhanced handguards. Rather than standard barrel nut threads, the enhanced upper has an internal barrel nut, and a separate handguard mounting platform. This unique method of separating barrel and handguard significantly reduces 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. Aero forges these uppers from 7075-T6 Aluminum, precision machined to work withmil-spec AR15 parts, and includes the ejection port door pre-installed. The internal barrel nut and required wrench are also included.
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 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 Slick Side Upper Receiver
- Ejection Port Door installed
- Barrel nut
- Barrel nut wrench
Specifications:
- Platform: AR15
- Material: Machined from 7075-T6 forged aluminum
- Finish: Anodized Black or Magpul Flat Dark Earth Cerakote
- Compatibility: Works with standard AR15/M16 components
- Weight: 11.28 oz
- Barrel Nut Torque – 55 ft-lbs
- Made In America: Yes
Have Questions About this Product?
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
Failed Background Check
There will be a 30% restocking fee on all lower receivers returned because of failed background checks.