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Questions & Answers
Is the gasblock pinned and are there dimples drilled for the set screws? Expert Answer

The Aero Precision M4E1 Enhanced 14.5in 5.56 M4 Carbine Length Barrel Complete Upper Receiver does not have a pinned gas block nor dimples for the set screws.

by Ethan, Gear Expert, August 8, 2022
Is the barrel a pin&weld? Expert Answer

No, the muzzle device is not pinned and welded.

by Nick B., Gear Expert, November 10, 2021
Customer Reviews
Helpful Positive Review Out of box review by Jake, Verified Owner, June 12, 2022
Looks great out of the box. Handguard was installed upside down which is strange and a little annoying but overall happy with purchase. Perfect finish and very quick shipping. Optics planet always killing it.
2/4 found this helpful
Read 1 Review

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Product Info for Aero Precision M4E1 Enhanced 14.5in 5.56 M4 Carbine Length Barrel Complete Upper Receiver with Flash Hider

This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets, enhanced milling design for grip and visual appeal and a new profile for the picatinny top rail.image

Specifications for Aero Precision M4E1 Enhanced 14.5in 5.56 M4 Carbine Length Barrel Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Caliber: 5.56x45mm NATO
Barrel Length: 14.5 in
Barrel Twist Rate: 1-7
Muzzle Device: A2 Flash Hider
Gun Model: AR-15
Condition: New
Handguard Length: 12 in
Magazine Included: No
Country of Origin: USA

Features of Aero Precision M4E1 Enhanced 14.5in 5.56 M4 Carbine Length Barrel Complete Upper Receiver with Flash Hider

  • M4E1 Upper Features:
  • Forged from 7075 T6 aluminum
  • Precision machined to M4E1 specs
  • M4 feedramps
  • Matte black hard coat anodized Mil 8625 Type 3 Class 2
  • Laser engraved T-marks
  • Comes assembled
  • with port door and forward assist installed
  • Accepts standard AR15/M16 components
  • Handguard mounting platform is forged into the receiver
  • Works with Aero Precision handguards but also fits most BAR-system handguards
  • Barrel nut and wrench are included
  • Gen 2 Enhanced Handguard Features:
  • 1pc free float design
  • Built in anti-rotation tabs
  • Scalloped rails
  • Continuous top rail
  • 1.78in inside diameter fits most muzzle devices and 1.5in suppressors
  • Compatible with low profile gas blocks
  • Gen 2 Feature - Quick disconnect sling socket at the 3
  • 6 and 9 oclock positions
  • Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal
  • Gen 2 Feature - New profile for the continuous picatinny top rail
  • 14.5in 5.56 M4 CMV Barrel
  • Carbine Length Features:
  • 5.56 Nato 14.5in Barrel
  • 1/7 twist
  • 4150 CrMoV
  • QPQ
  • gas port drilled
  • .750 gas block journal
  • Carbine length gas system
  • .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider
  • Included Accessories:
  • M4E1 Enhanced Assembled Upper Receiver
  • Enhanced Handguard of choice
  • 14.5in 5.56 M4 CMV Barrel
  • Carbine Length
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled
  • This complete upper does not include BCG or Charging Handle
  • These products may be selected as add-ons under the FINISH YOUR BUILD tab
  • 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 16in as defined by the ATF for a rifle build.

Aero Precision M4E1 Enhanced 14.5in 5.56 M4 Carbine Length Barrel Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EQ-12 Handguard Gen 2, Anodized Black, APAR640231Q32 , MPN: APAR640231Q32 , Code: 29D-UFH-M4E1E556145M4CL-APAR640231Q32
Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EM-12 Handguard Gen 2, Anodized Black, APAR640231M32 , MPN: APAR640231M32 , UPC: 840014603527 , Code: 29D-UFH-M4E1E556145M4CL-APAR640231M32
Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EM-12 Handguard Gen 2 Cerakote, Flat Dark Earth, APAR640232M32 , MPN: APAR640232M32 , Code: 29D-UFH-M4E1E556145M4CL-APAR640232M32

Aero Precision M4E1 Enhanced 14.5in 5.56 M4 Carbine Length Barrel Complete Upper Receiver with Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EK-12 Handguard Gen 2 Cerakote, Flat Dark Earth, APAR640232P32 , MPN: APAR640232P32 , Code: 29D-UFH-M4E1E556145M4CL-APAR640232P32
Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EK-12 Handguard Gen 2, Anodized Black, APAR640231P32 , MPN: APAR640231P32 , UPC: 840014603503 , Code: 29D-UFH-M4E1E556145M4CL-APAR640231P32
Aero Precision M4E1-E Complete Upper, 14.5in 5.56 M4 Carbine Barrel, EQ-12 Handguard Gen 2 Cerakote, Flat Dark Earth, APAR640232Q32 , MPN: APAR640232Q32 , Code: 29D-UFH-M4E1E556145M4CL-APAR640232Q32
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