Aero Precision M4E1-E Complete Upper, 16' 5.56 M4 CMV Carbine Barrel, 15" Enhanced MLOK HG - FDE Cerakote

SKU: APAR640252M6
Fully Assembled and Warrantied by Aero Precision

Only 1 left in stock

Ballistic Advantage Authorized DealerAero Precision Authorized Dealer

Aero Precision M4E1-E Complete Upper, 16′ 5.56 M4 CMV Carbine Barrel, 15″ Enhanced MLOK HG – FDE Cerakote

The Aero Precision Complete Upper Receiver epitomizes speed, efficiency, and dependability for fashioning a semi-custom AR15 rifle. Crafted with meticulous precision, this 5.56 NATO M4E1 Threaded Complete Upper boasts a 16″ Carbine barrel and a 15″ Gen 2 Enhanced handguard. Meticulously machined, comprehensively assembled, and subject to rigorous test-firing by skilled Aero Precision armorers, it guarantees unparalleled performance.

* Does not include Bolt Carrier Group or Charging Handle.


  • M4E1 Threaded Assembled Upper Receiver – Magpul FDE Cerakote
  • 15″ M-LOK Gen 2 Enhanced Handguard – Magpul FDE Cerakote
  • 16″ 5.56 NATO Carbine Barrel – M4 Profile
  • Low-profile Gas Block and Gas Tube
  • Standard A2 Flash Hider

M4E1 Threaded Upper Receiver Features:

  • New enhanced forging gives the upper receiver a “billet look.”
  • M4 Feed ramps
  • .250 takedown pin holes
  • Includes port door and forward assist installed

Gen 2 Enhanced Handguard Features:

  • 1pc free-float design
  • Built-in anti-rotation tabs
  • Scalloped rails
  • Quick disconnect sling socket at the 3, 6, and 9 o’clock positions
  • Compatible with low-profile gas blocks
  • 1.78″ Inside diameter, fits most 1.5″ suppressors
  • Additional milling along flats to aid with gripping and visual appeal
  • New profile for the continuous Picatinny top rail

5.56 NATO M4 Barrel Features:

  • 5.56 NATO 1/7 twist, 4150 CrMoV, QPQ finish
  • .750 gas block journal
  • Carbine gas system
  • M4 Feed Ramp Extension
  • HP and MPI tested

Product Information


Aero Precision

Made in USA





5.56 NATO


15" MLOK

Attachment Type


Coating Type

Magpul FDE Cerakote



Barrel Length


Gas System


Barrel Finish

QPQ Nitride

Muzzle Thread



4150 Chrome Moly Vanadium, 6061-T6 Aluminum


Standard AR15 components

Part Type

Upper Receiver Parts

Gas Block Diameter


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