Aero Precision M4E1 Threaded 20" .350 Legend Carbine Length Complete Upper Receiver with 16.6" ATLAS R-ONE Handguard - Anodized Black - APAR700106M100

Aero Precision APAR700106M100: This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. 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. This complete upper does not include BCG or Charging Handle. 

Includes:

• M4E1 Threaded Assembled Upper Receiver
• 16.6" ATLAS R-ONE Handguard
• 20" 5.56 Rifle Length CMV Barrel
• Low Profile Gas Block and Rifle Length Gas Tube
• Product comes assembled

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:

• 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

20" .350 Legend Carbine Length CMV Barrel Features:

• .350 Legend 20" Carbine Length, 1/16 twist, 4150 CrMoV, QPQ, gas port drilled
• .750 gas block journal
• Government Profile
• Rifle length gas system, .0785 gas port
• M4 Feed Ramp Extension
• HP and MPI tested
• Standard A2 flash hider