Aero Precision M4E1-T PRO Complete Upper, 12.5″ 5.56 CHF Mid-Length Barrel, 10.3″ ATLAS R-ONE MLOK HG – Anodized Black
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.
* NFA Rules apply for this item.
* The muzzle device is NOT pinned nor welded to the barrel.
- 12.5″ PRO 5.56 NATO Cold Hammer Forged Barrel
- PRO 5.56 Bolt Carrier Group
- M4E1 Threaded Upper Receiver
- 10.3″ 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.
|Made in USA||
4150 Chrome Moly Vanadium, 6061-T6 Aluminum
Standard AR15 components
Upper Receiver Parts
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