M4E1 Threaded 16" 5.56 Mid-Length Complete Upper w/ 15" ATLAS R-ONE, Adjustable Gas Block, VG6 Epsilon 556, BREACH® Charging Handle, PRO BCG - Anodized Black

Special Price $599.98 Regular Price $876.97
In stock

This complete upper is loaded with everything you need to hit the ground running on your next build! Included ATLAS Handguard, Adjustable Gas Block, 5.56 PRO BCG, BREACH Ambidextrous Charging Handle, and VG6 Epsilon Muzzle Device give you all the upgrades you need out of the box!


  • M4E1 Threaded Assembled Upper Receiver - Anodized Black
  • 15" ATLAS R-ONE Handguard
  • 16" 5.56 CMV Barrel, Mid-Length
  • .750 Adjustable Gas Block and Mid-Length SS Gas Tube
  • AR15 BREACH Ambidextrous Charging Handle (Large Lever)
  • AR15 5.56 PRO Bolt Carrier Group
  • VG6 Epsilon 556 Muzzle Device

M4E1 Threaded Upper Receiver Features:

  • New enhanced forging that gives the upper receiver a "billet look"
  • New picatinny profile
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes port door and forward assist installed

ATLAS R-ONE Handguard Features:

  • Full top picatinny rail for optional attachments
  • 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

16" 5.56 CMV Barrel, Mid-Length Features:

  • 5.56 NATO 16" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
  • .750 gas block journal
  • Mid length gas system, .0785 gas port
  • M4 Feed Ramp Extension
  • HP and MPI tested
Shipping to FFL Dealer RequiredNo
Made In America?Yes
Select Your FinishAnodized Black
Black Friday CategoriesComplete Uppers
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