Aero Precision M4E1-T PRO Complete Upper, 16.3" 5.56 CHF Mid-length barrel, 15" ATLAS R-ONE MLOK HG - Kodiak Brown Anodized

SKU: APUG700401M103-1
Fully Assembled and Warrantied by Aero Precision

In stock

Ballistic Advantage Authorized DealerAero Precision Authorized Dealer

Aero Precision M4E1-T PRO Complete Upper, 16.3″ 5.56 CHF Mid-length barrel, 15″ ATLAS R-ONE MLOK HG – Kodiak Brown

Includes PRO Bolt Carrier Group and BREACH Charging Handle

The PRO Upper Receiver Group is built around our PRO 5.56 Cold Hammer Forged Barrel paired with our PRO 5.56 BCG. The ATLAS R-ONE Handguard, BREACH Charging Handle, and VG6 Delta muzzle device turn this assembly into a premium turnkey solution for your next build.


  • 16.3″ PRO 5.56 NATO Cold Hammer Forged Barrel
  • PRO 5.56 Bolt Carrier Group
  • M4E1 Threaded Upper Receiver
  • 15″ ATLAS R-ONE Handguard
  • VG6 Delta Flash Hider
  • Mid-Length Gas System
  • AR15 BREACH¨ Ambi Charging Handle w/ Large Lever – Black

About Cold Hammer Forging

Cold hammer forging differs from other standard barrel manufacturing processes. Rather than drilling a blank and using cutters, buttons, and reamers to machine the chamber and rifling into the barrel, a cold hammer-forged barrel is formed around a mandrel with the rifling inclusions precision ground into it. This process is called “cold” hammer forging because the process is done at room temperature, and the metal is not heated.

Product Information


Aero Precision

Made in USA





5.56 NATO


15" MLOK

Attachment Type


Coating Type

Anodized Kodiak Brown


Kodiak Brown

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



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