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Aero Precision M4E1 5.56 Carbine Complete Upper w/ M-Lok Atlas Handguard - 10.5" Anodized Black

AR-15 Complete Upper Receiver

Out of stock

Aero Precision M4E1 10.5" 5.56 Carbine Threaded Complete Upper w/ 9.2" M-LOK ATLAS Handguard - Anodized Black


This complete upper receiver features the same tried-and-true construction and aesthetics as Aero Precision M4E1 Threaded Upper Receivers, without provisions for a forward assist. The included S-ONE handguard is designed with size and weight in mind. Featuring a trimmed down top rail to help minimize weight and overall profile. Their proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

M4E1 Threaded, No Forward Assist Upper Receiver Features:

  • No Forward Assist
  • Custom enhanced forging that gives the upper receiver a "billet look" while maintaining the structural integrity of a forged part.
  • Picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes

ATLAS S-ONE Handguard Features:

  • Front and rear picatinny rail
  • Eliminated center of top rail for weight reduction
  • Indexing grooves in 12:00 position for positive grip control
  • Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
  • 1.3" Inside diameter
  • 1.5" Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels
  • M-LOK attachment points

10.5" 5.56 Barrel Features:

  • 5.56 NATO 10.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
  • .750 gas block journal
  • Carbine length gas system, .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider


  • Made In America Yes
  • Platform AR15
  • Series M4E1
  • Caliber 5.56 NATO
  • Barrel Length 10.5"



  • M4E1 Threaded Upper Receiver, No Forward Assist
  • 9.2" ATLAS S-ONE Handguard
  • 10.5" 5.56 CMV Barrel
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Port Door Assembly
  • A2 Flash Hider
More Information
SKU APAR712102M2
Product Type AR-15 Complete Upper Receiver
Manufacturer Aero Precision
Color Black
Rail Length 9.2"
Barrel Length 10.5"
Caliber 5.56 NATO
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