Aero Precision M4E1-T Complete Upper Flat Dark Earth 6.5 Grendel 18″ Barrel

Aero Precision M4E1-T Features

The 18-inch 416R stainless steel barrel features a 1:8 twist rate, optimizing bullet stabilization for improved accuracy. The barrel is treated with a stainless steel finish, enhancing durability and longevity. A rifle-length gas system ensures reliable cycling, while the .750-inch gas block journal accommodates low-profile gas blocks.

The M4E1-T upper receiver is forged from 7075-T6 aluminum, providing strength without unnecessary weight. It includes M4 feed ramps and comes assembled with a forward assist and port door installed. The integrated handguard mounting platform simplifies assembly and enhances rigidity.

Paired with a 15-inch ATLAS R-ONE M-LOK Handguard, this upper offers ample space for accessory attachment. The handguard features quick disconnect sling sockets at the 3, 6, and 9 o’clock positions, built-in anti-rotation tabs, and a continuous top rail for seamless integration of optics and sights. The 1.3-inch inside diameter accommodates most muzzle devices and 1.5-inch suppressors.

A standard A2-style flash hider is installed to reduce muzzle flash.

Aero Precision M4E1-T Specifications

• Caliber: 6.5 Grendel
• Barrel Length: 18 inches
• Barrel Material: 416R Stainless Steel
• Barrel Finish: Stainless Steel
• Twist Rate: 1:8
• Gas System Length: Rifle
• Gas Block Journal: .750 inches
• Muzzle Thread Pattern: 5/8×24
• Muzzle Device: A2-style flash hider
• Upper Receiver Material: 7075-T6 aluminum
• Handguard Length: 15 inches
• Handguard Type: ATLAS R-ONE M-LOK
• Handguard Material: 6061-T6 aluminum
• Handguard Features:
  • Quick disconnect sling sockets at 3, 6, and 9 o’clock positions
  • Built-in anti-rotation tabs
  • Continuous top rail
  • 1.3-inch inside diameter
• Finish: Flat Dark Earth (FDE) Cerakote
• Weight: Approximately 68.5 ounces

Please note, this complete upper receiver assembly does not include a bolt carrier group (BCG) or charging handle; these components are available separately.