AERO PRECISION M4E1-T ATLAS R-ONE ASSEMBLED UPPER RECEIVERS 10.5" 5.56MM

This assembled upper includes the Aero Precision 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. The 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 R-ONE Handguard of choice
• 10.5" 5.56 CMV Barrel, Carbine Length
• Low Profile Gas Block and Carbine Length Gas Tube
• Product comes assembled

This assembled upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab The muzzle brake that comes with this assembled 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 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 installed

Learn More about our NEW ATLAS S-ONE Hanguards 10.5" 5.56

Barrel Features:

• 5.56 Nato 10.5" 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