Aero Precision M4E1-E Complete Upper, 16" 5.56 HBAR Mid Barrel, EM15 - Ano

SKU: APAR600218M97
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Aero Precision M4E1-E Complete Upper, 16″ 5.56 HBAR Mid Barrel, EM15 – Ano

This complete upper receiver incudes an HBAR profile barrel that is laser marked “HBAR”.


M4E1 Enhanced Assembled Upper Receiver
15″ Enhanced M-LOK Handguard
16″ 5.56 HBAR barrel
Low Profile Gas Block and Mid-Length Gas Tube
Product comes assembled
This complete upper does not include BCG or Charging Handle.
M4E1 Upper


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


1pc free float design
Built in anti-rotation tabs
Scalloped rails
Continuous top rail
1.78″ inside diameter fits most muzzle devices and 1.5″ suppressors
Compatible with low profile gas blocks
Gen 2 Feature – Quick disconnect sling socket at the 3, 6 and 9 o’clock 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
16″ 5.56 HBAR Barrel
5.56 Nato 16″ Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
.750 gas block journal
Mid-Length Gas System
M4 Feed Ramp Extension
HP and MPI tested
Standard A2 flash hider

Product Information


Aero Precision




5.56 NATO

Coating Type

Black Anodize

Gas System


Gas Block Diameter


Attachment Type




Muzzle Thread


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