Aero Precision M4E1-T AR15 Complete Upper 300 BLK 8″ – No BCG/Charging Handle

Click Here for Price
Out of Stock
We'll special order for you! Allow 3-5 days to Ship
AT3™ M-LOK Rail Section - 5 or 7 Slots - Made in USA - 7 Colors Available

AT3™ M-LOK Rail Section - 5 or 7 Slots - Made in USA - 7 Colors Available - Black, 5 Slots


Aero Precision M4E1-T 8″ 300 Blackout Upper

Build your ultimate 300 BLK AR pistol with Aero Precision’s enhanced M4E1-T complete upper. This assembly centers around an 8″ CMV barrel chambered in .300 Blackout with a 1:7 twist rate and pistol-length gas system.

The free-float 7.3″ ATLAS R-ONE M-LOK handguard provides a sleek, lightweight profile with M-LOK slots for accessory attachments. The rugged M4 flat-top upper receiver features a low-profile gas block.

This assembled upper does not include a bolt carrier group or charging handle. Choose from a durable black anodized or Cerakote flat dark earth finish – both made in the USA from premium materials.


  • Brand: Aero Precision
  • Model: M4E1-T AR15 Complete Upper 300 BLK 8″
  • MPN: APAR700701M1, APAR700711M1
  • Caliber: .300 Blackout
  • Barrel Length: 8″
  • Gas System: Pistol
  • Twist Rate: 1:7
  • Handguard: 7.3″ ATLAS R-ONE M-LOK
  • Upper Receiver: M4 Flat-Top
  • Material: Aluminum
  • Finish: Anodized Black or FDE Cerakote
  • Made in USA
  • Does Not Include BCG or Charging Handle

Products available on this page:

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

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

Failed Background Check

There will be a 30% restocking fee on all lower receivers returned because of failed background checks.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.