The Aero Precision M4E1-T Complete Upper (brand part number APAR700714M99) delivers the same 13.9-inch 5.56 NATO mid-length CMV barrel as the company’s standard M4E1-T build, finished in FDE for shooters who want a color-matched build. Built by Aero Precision on a forged M4E1 threaded upper receiver, it includes the 12.7-inch ATLAS R-ONE M-LOK handguard, a low-profile gas block, and a standard A2 flash hider, with the forward assist and dust cover already installed. It ships fully assembled but without a bolt carrier group or charging handle.

Key Specifications

• Barrel length is 13.9 inches, chambered in 5.56 NATO.
• Finished in FDE for a color-matched build.
• Runs a mid-length gas system with a low-profile gas block.
• Handguard is the 12.7-inch ATLAS R-ONE M-LOK free-float design.
• Upper receiver is forged 7075-T6 aluminum with a billet-look profile.
• Fitted with a standard A2 flash hider muzzle device.
• Ships without a bolt carrier group or charging handle.

Frequently Asked Questions

How does this differ from the black M4E1-T 13.9-inch upper? It is built to the same specification but finished in FDE instead of black.

Can this create an SBR if I add a lower? Because the barrel is under 16 inches, pairing it with a shouldered rifle-configured lower without an approved NFA registration would create a Short-Barreled Rifle; building it as an AR pistol on an unregistered lower is legal.

Buy the Aero Precision M4E1-T 13.9-inch Mid-Length FDE Upper

Build a color-matched, close-quarters AR upper on a proven mid-length gas system. Order this upper receiver from our Lubbock, Texas gun shop, and we will get it to your door as soon as it’s ready to ship.