Aero Precision M4E1 AR15 Complete Upper, 223 Remington/556NATO, 16" Barrel, 1:7 Twist, ATLAS S-ONE Handguard, Mid Length Gas System, Cerakote Finish, Flat Dark Earth, Does Not Include BCG or Charging Handle APAR700315M7

This complete upper includes the 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. 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.

• M4E1 Threaded Assembled Upper Receiver
• ATLAS S-ONE M-LOK Handguard of choice
• 16" 5.56 CMV Barrel
• Low Profile Gas Block and Mid-Length Gas Tube
• Product comes assembled
• This complete upper does not include BCG or Charging Handle