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Questions & Answers
What is the overall length of this complete upper Expert Answer

The Aero Precision M4E1 16in .223 Wylde Complete Upper Receiver with Flash Hider overall length is 16".

by Hunter, Gear Expert, November 13, 2023
Is this MD.LEGAL Manufacturer Answer

Recommend contacted your local FFL to confirm all your state/local laws

by Aero Precision USA, Manufacturer, April 7, 2022
Customer Reviews
Most Recent Reviews
Beautiful craftsmanship by Ben, Verified Owner, December 13, 2025
As expected from aero precision, everything looks very nice and high quality.
Read 1 Review

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Product Info for Aero Precision M4E1 16in .223 Wylde 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

This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons.

WARNING: California`s Proposition 65

Specifications for Aero Precision M4E1 16in .223 Wylde Complete Upper Receiver with Flash Hider:

Manufacturer: Aero Precision
Caliber: .223 Wylde
Overall Length: 26 in
Barrel Length: 16 in
Barrel Profile: SPR
Gas System Length: Mid Length
Barrel Twist Rate: 1-8
Threads per Inch: 1/2x28
Muzzle Device: A2 Flash Hider
Gun Model: AR-15
Condition: New
Fabric/Material: 7075-T6 Aluminum
Gas Block Journal Size-Diameter: .750 in
Handguard Length: 15 in
Gun Rail: Picatinny
Gun Make: AR Platform
Included Accessories: None
Barrel Material: 416R Stainless Steel
Gas Block Journal Size-Length: .750 in
Weight: 48.5 oz
Magazine Included: No
Mount Type: M-LOK
Country of Origin: USA

Features of Aero Precision M4E1 16in .223 Wylde Complete Upper Receiver with Flash Hider

M4E1 Upper Receiver Features:

  • Forged from 7075 T6 aluminum
  • Precision machined to M4E1 specs
  • M4 feedramps
  • 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 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

.223 Wylde Stainless Steel QPQ Barrel Features:

  • .223 Wylde Barrel, 1/8 Twist
  • QPQ Corrosion Resistant Finish
  • .750 gas block journal
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider

Package Contents:

  • Aero Precision M4E1 16in .223 Wylde Complete Upper Receiver with Flash Hider
  • M4E1 Enhanced Upper Receiver
  • 15in Enhanced M-LOK Handguard of choice
  • .223 Wylde Stainless Steel QPQ Barrel
  • Pinned Low Profile Gas Block and Gas Tube
  • A2 Flash Hider
  • Product comes assembled

Aero Precision M4E1 16in .223 Wylde Complete Upper Receiver with Flash Hider Orderable Models

List of Orderable Models

  • Aero Precision M4E1 Complete Upper, .223 Wylde, 16in, Mid Length, 1/8, EM-15 Gen2, A2, Anodize Black, APAR600251M72 , MPN: APAR600251M72 , UPC: 815421029093 , Code: 29D-UFH-APUM01-APAR600251M72
  • Aero Precision M4E1 Complete Upper, .223 Wylde, 16in, Mid Length, 1/8, EM-15 Gen2, A2, FDE, APAR600252M72 , MPN: APAR600252M72 , UPC: 815421029109 , Code: 29D-UFH-APUM01-APAR600252M72

Aero Precision M4E1 16in .223 Wylde Complete Upper Receiver with Flash Hider Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Aero Precision M4E1 Complete Upper, .223 Wylde, 16in, Mid Length, 1/8, EM-15 Gen2, A2, FDE, APAR600252M72 , MPN: APAR600252M72-DEMO , Code: 29D-UFH-APUM01-APAR600252M72-DEMO
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