M4E1 Assembled Gen 2 Upper Receiver 8 Pistol Length
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specifications


Manufacturer:

Aero Precision

Platform:

AR-15

M4E1 Assembled Gen 2 Upper Receiver 8 Pistol Length

Where to buy

Store Price Availability
Brownells $534.99
checked Sep 27, 2026
Out of stock Buy at Brownells Add to build

Prices and availability change often, so confirm on the store's site before you buy.

Description

Enhanced Tactical Upper for a Custom AR Pistol / SBR / Carbine Build

From Aero Precision, the AR-15 M4E1 .300 Blackout Assembled Upper Receivers. Chambered in 300 Blackout, the upper is finished with black anodizing and available in three lengths, each with different length handguards. This upper does not come with the charging handle or bolt carrier group, allowing the user to personalize their upper receiver even more! The Aero Precision Assembled Upper Receiver also features:

  • M-LOK EM-7 7” for 8” barrel, 9” handguard for 10” barrel, 15” handguard for 16” barrel
  • 8”, 10”, and 16” carbine length chrome moly barrel
  • Pistol length gas system w/ low profile gas block
  • Standard A2 muzzle brake- not pinned or welded
  • Bolt Carrier Group and Charging Handle NOT included
  • Made in the USA

The Aero Precision AR-15 8", 10", or 16” Assembled Upper Receiver is a great choice for your next AR-15 build!
The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16"" as defined by the ATF for a rifle build.

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