This AR15 Complete Upper is the same upper receiver used in the AERO M16A4 Special Edition Complete Rifle and features a 20″ 5.56 Barrel with Pinned FSB, A2 Handguard and A2 Detachable Carry Handle.

Features :

• Upper: Standard M4 Upper Receiver
• “Barrel: 20″ 5.56 NATO, Rifle Length, 1:7 Twist, 4150 Chrome Moly Vanadium, QPQ corrosion resistant finish”
• Sights: A2 Detachable Carry Handle and A2 Front Sight Block w/ Bayonet Lug
• Handguard: A2 Style Handguard, Rifle Length
• Gas System: Rifle Length Gas System
• Muzzle Device: Standard A2 Flash Hider
• This complete upper does not include a BCG or Charging Handle