Aero Precision M4E1 300 BLK 16" Enhanced M-LOK FDE Complete Upper

SKU: APAR640252M14

In stock

Ballistic Advantage Authorized DealerAero Precision Authorized Dealer

Aero Precision M4E1 300 BLK 16″ Enhanced M-LOK FDE Complete Upper


Aero Precision M4E1 300 BLK 16″ Enhanced M-LOK FDE Complete Upper is the most efficient way to assemble your semi-custom firearm, fully assembled and warrantied by Aero Precision. This complete upper features an M4E1 Upper Receiver, 15″ Gen 2 Enhanced M-LOK Handguard, a 16″ 300 BLK barrel with a standard birdcage muzzle device, and is finished in a flat dark earth Cerakote.

***Does not include Bolt Carrier Group or Charging Handle.

M4E1 Upper Receiver Features:

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

Enhanced Handguard Features:

  • Full top Picatinny rail for optional attachments
  • Quick disconnect sling socket at the 3, 6, and 9 o’clock positions
  • Compatible with low-profile gas blocks
  • Compatible with mil-spec AR15 upper receivers and barrels

16″ 300 BLK Barrel Features:

  • Material: Chrome Moly Vanadium
  • Finish: QPQ Corrosion-resistant finish both inside and out.
  • Gas System: Pistol Gas w/ .750 Journal
  • Other: M4 Extension | HP and MPI Tested
  • Standard A2 flash hider


  • M4E1 Assembled Upper Receiver
  • M-LOK Enhanced Handguard
  • 16″ 300 BLK CMV Barrel
  • Low Profile Gas Block and Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle.
  • The muzzle brake with this complete upper receiver is NOT pinned nor welded to this barrel.


Product Information

Made in USA





300 Blackout

Coating Type



Standard AR15 components

Barrel Length



Aero Precision

Gas System


Gas Block Diameter


Attachment Type


Muzzle Thread


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