Brownells 75th Anniversary - A Shooting Heritage
Menu

This complete upper includes Aero Precision's new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's 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.
Includes:

  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS S-ONE Handguard of choice
  • 11.5" 5.56 CMV Barrel, Carbine Length
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled

This complete upper does not include BCG or Charging Handle. The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.

  • M4E1 Threaded Upper Receiver Features:
  • New enhanced forging that gives the upper receiver a "billet look"
  • New picatinny profile that blends seamlessly with our Enhanced Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes port door and forward assist installed
  • 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
  • Compatible with low profile gas blocks
  • 1.3" Inside diameter
  • 1.5" Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels

 

AERO PRECISION - M4E1-T ATLAS S-ONE COMPLETE UPPER RECEIVERS 11.5" 5.56MM

narrow your choices »
Show Filters
2 Item(s)

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 5.56 mm NATO

Finish: Black

Style: Complete

Contour: M4

Length: 11.5

Alert Me When Available

This item is currently unavailable for backorder.

Cartridge: 5.56 mm NATO

Finish: Flat Dark Earth

Style: Complete

Contour: M4

Length: 11.5