Expo Arms X Mega Arms AR-15 Forged Stripped Upper Receiver

Manufactured by Expo Arms
Manufactured by Expo Arms
5 Reviews
$94.99 $119.99

In Stock

Due to the overwhelming response to our Black Friday and Cyber Monday sales, we are working hard to catch up! New orders of non-FFL items will ship within 5 business days (M-F), and FFL orders will ship within 10 business days if transfer details are provided.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details



The Forged and Stripped AR-15 Upper Receiver is the foundation of your upper build. This receiver accepts MIL-SPEC components, including forward assist and port door assemblies. Precision machined from a 7075-T6 aluminum forging, this upper is protected by a MIL-SPEC Type III Class 2 hardcoat anodized finish. Built to extremely precise tolerances, these upper receivers go through a rigorous quality control process to ensure they are built to high quality with a premium finish.

NOTE: Port door and forward assist hardware not included.

  • 7075-T6 forged aluminum
  • M4 feed ramp cuts
  • Type III Class 2 hardcoat anodized
  • Engraved T-marks
  • Accepts MIL-SPEC upper parts
  • Manufactured by Mega Arms

Expo Arms offers top-quality MIL-SPEC AR-15 components at rock bottom prices. Made in the U.S.A. and covered by Expo’s Limited Lifetime Warranty against manufacturer defects, material or workmanship problems, and even normal wear and tear!
See More


BrandExpo Arms
Feed RampsM4
FinishHardcoat Anodized
Forward AssistAccepts Standard Forward Assist
Port DoorAccepts Standard Port Cover
Receiver Material7075-T6 Aluminum
T MarksT-Marked
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 www.P65Warnings.ca.gov.

Ratings & Reviews

5 reviews

  • 4 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Great Finish! Great Fit!

by -

Expo has really impressed me. Haven't heard of them before i ordered my recievers, and had just found this upper while browsing one day. I needed one to match my Expo arms lower so I ordered it.
The fitment with the is extremely tight with no gaps or slop between the upper and lower. The fitment for the barrel is extremely tight as well. The anodization is very thick and looks very good.
It's made by Mega so you can't go wrong ordering this. It matches perfect with a SOLGW lower receiver too. Order it, you won't be disappointed.


by -

Today is Saturday February 25th, 2023 and I just received my new Expo Arms X Mega Arms upper receiver. The receiver is not a "blem" and was not purchased at a discounted price. I was eager to receive the part because it was to be the final part of my build and I was planning on hitting the range today. Unfortunately, the item I received appears to have been scratched at several points. I don't know if this was a returned item or if it's due to careless handling from the manufacturer.
The finish is missing/damaged at the brass deflection ramp, on the interior of the receiver (where the bcg gets inserted) and at the forward assist port. The imperfections are not detrimental to the function of the receiver, however, I do expect to receive an undamaged/unblemished product any time I purchase a new item from Primary Arms.

We were happy to speak to you on this so we could get you taken care of.


by -

David from Customer Service contacted me and took care of my initial concerns with my upper receiver. Other than the small blemishes, the upper receiver is actually a very nice looking product. The finish matches my SOLGW lower receiver and fits perfectly. Primary Arms offers exceptional customer service and will continue to earn my future business. Thanks David!

Have several of these !


These are the best uppers I have! The fitment and the finish is awesome and the lower to match is just as great, I have several of the lowers too. This is my go to set. It was aero enhanced but these you don’t need to adjust the tension screw so putting different uppers and lowers together is never an issue, and I don’t need to adjust a tension screw to fit it right to another upper like aero. (I love the aero ones too so no hate)
But this is the same that Zev and rainier arms ( plus some of the non-billet SOLGW ) use for their Milspec. I have them and they are identical. Other than badges. Get this and the lower and you will be set for a thick black beautiful finish that fits tight,

The best…around!


Identical to SOLGW or MEGA uppers. Fantastic in every regard…finish, machining, figment, overall quality is as good as it gets for a forged upper. Catch them on sale for around $100 and it’s a no brainer. Even at full price you’re getting a discounted SOLGW upper and not paying the ridiculous markup. PA and Expo aren’t fooling around. They’re bringing the best quality for very reasonable prices.