Aero Precision M4E1 Enhanced AR-15 Barreled Upper .300 BLK - 16"

Manufactured by Aero Precision
SKU: APAR640251M14
MPN: APAR640251M14
Manufactured by Aero Precision
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When it comes to complete upper receivers, this .300 Blackout chambered semi-automatic barrel displays the attention to quality, and engineering expertise Aero Precision demonstrates daily.  

  • Upper Material: 7075-T6 Aluminum
  • Barrel: Chrome Moly Vanadium
  • M4 Feed Ramps
  • M-LOK Handguard
  • Barrel Length: 16 Inches
  • Does not include bolt carrier group or charging handle.

This .300 Blackout caliber upper receiver from Aero Precision features a body forged of 7075-T6 Aerospace grade aluminum and offers M4 feed ramps and Hard Coat Anodized Type III MIL-SPEC coating. In addition, the Generation 2 Enhanced handguard features a one-piece free-floating design and built in anti-rotation tabs. 

Additionally, Aero Precision builds this upper receiver with the port door already assembled and the forward assist installed. The barrel of the .300 Blackout upper receiver is sixteen inches long and made of 4150 Chrome Moly Vanadium and the barrel is finished with QPQ Corrosion Resistant finish. The barrel muzzle is threaded at 5/8x24 and HP and MPI tested. Aero Precision also includes an A2 flash hider.

Every quality detail on this upper receiver has been thoroughly engineered, precisely machined, and tested for strength and reliability. 

Aero Precision has been manufacturing quality MIL-SPEC parts for its customer's for the better part of twenty-six years. They have grown to become a leading manufacturer of MIL-SPEC parts and accessories, semi-automatic rifle upper receivers, lowers, barrels, and much more during almost three decades.
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AssemblyBarreled Assemblies
Barrel CoatingHardcoat Anodized
Barrel Length16
Barrel LiningQPQ Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandAero Precision
Caliber Gauge300 Blackout
Gas System LengthPistol
Gas System TypeDirect Impingement
Handguard15 in Aero Precision Gen2 Enhanced M-LOk Handguard
Muzzle DeviceA2 Flash Hider
Twist Rate1:7

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