MPN: APAR308554M25 / APAR308556M25 / APAR308253M25


  • Caliber: .308 Win
  • Finish: Type III Class 2 Hardcoat Anodized or Cerakoted Flat Dark Earth
  • Upper Receiver: Aero Precision M5E1 Upper (DPMS High Profile) - 7075-T6 Aluminum
  • Handguard: 15-Inch or 16.6-Inch Gen 2 Enhanced M-LOK Handguard
  • M4 Feed Ramps: Yes
  • Muzzle Device: A2 Flash Hider
  • Barrel: 18-Inch 1:10 QPQ Coated 4150 Chrome Moly Vanadium Barrel
  • Muzzle Thread Pattern: 5/8"-24 TPI
  • Gas Block: Aero .750" Low-Profile Gas Block
  • Gas Tube: Rifle-Length Gas tube
  • Bolt Carrier Group: Not Included
  • Charging Handle: Not Included
  • HP and MPI Tested

*This upper assembly does not come with Bolt Carrier Group and Charging Handle


  • Weight: ~5.41 lbs.
  • Overall Length: ~27.75"


  • DPMS LR-308 style lower receivers


  • 1x Aero Precision Enhanced 18" .308 CMV M5E1 Complete Upper Assembly


The .308 Winchester is one of the most popular calibers for hunting big game, self-defense, and long-range shooting. It is a fairly common round, and if you are looking to build an AR-pattern rifle chambered in .308 Winchester, you should check out the Aero Precision Enhanced M5E1 Complete Upper Assembly.

Quality Parts

This upper assembly includes a barrel, Gen 2 Enhanced M-LOK handguard, gas system, and M5E1 receiver. The 18-inch barrel is made from 4150 Chrome Moly Vanadium steel and has a QPQ coated finish, which is very durable and corrosion-resistant. The barrel comes with a standard A2 flash hider. However, it is also threaded to attach other muzzle devices.

This Upper assembly comes with the Gen 2 Enhanced M-LOK Handguard. This low-profile, one-piece, free-floating, modern handguard has M-Lok slots on three sides and a full-length top Picatinny rail. It is Scalloped to decrease weight and has built-in anti-rotation tabs to prevent movement as well.

Build for The Most Demanding Environment

The receiver of the M5E1 Upper has a DPMS high profile design, which fits seamlessly with the Gen 2 Enhanced Handguard. It is made from 7075-T6 Aluminum and has a hard-coat anodized finish. This receiver features a forward assist, port cover, and M4 feed ramps to improve reliability and performance. The gas system features a low-profile gas block with a rifle-length gas tube, which is ideal for an 18-inch barrel.

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