Description
Aero Precision M4E1 Threaded PRO 13.7″ CHF 5.56 M-LOK Midlength Complete UpperThe PRO Upper Receiver Group built around our PRO 5.56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard, BREACH Charging Handle, and VG6 Delta muzzle device round this assembly out into a premium turnkey solution for your next build.Includes:13.7″ PRO 5.56 Cold Hammer Forged BarrelPRO 5.56 Bolt Carrier GroupM4E1 Threaded Upper ReceiverATLAS R-ONE HandguardVG6 Delta Flash HiderMid-Length Gas SystemAR15 BREACH® Ambi Charging Handle w/ Large Lever – BlackNOTICE: The muzzle device on this upper receiver is not pinned or welded.About Cold Hammer ForgingCold hammer forging differs from other common 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 made by forming the barrel around a mandrel that has the rifling inclusions precision ground into it. This process is referred to as “cold” hammer forging because the process is done at room temperature and the metal is not heated.All NFA rules and regulations apply.
