Aero Precision M4E1 Threaded 11.5" 5.56 R-ONE Complete Upper - Anodized Black

This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our 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 10.3" ATLAS R-ONE M-LOK Handguard 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 installedATLAS R-ONE HANDGUARD 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 installed11.5" 5.56 BARREL FEATURES: 5.56 Nato 11.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled Government Profile .750 gas block journal Carbine length gas system, .0785 gas port M4 Feed Ramp Extension HP and MPI tested Standard A2 flash hider