Rock River Arms 16" Mid Length A4 Complete Upper Half

• Includes Bolt Carrier Group and Charging Handle Assembly
• Caliber:  5.56mm NATO Chamber for 5.56mm and .223 Caliber
• Upper Receiver:  Forged A4
• Barrel:  16" Chrome Moly, 1:9 Twist
• Muzzle Device:  A2 Flash Hider / 1/2 - 28 Thread
• Front Sight:  A2 Front Sight
• Handguard:  Black Mid-length Handguard

Note:  The optional Wraparound Quad Rail Handguard is not compatible with the optional Gas Block Sight Base.

• Handguard: 

  • Green Mid-Length Handguard
  • RRA Aluminum Free Float Tube
  • RRA Quad Rail Free Float
  • RRA Half Quad w/Full Top Rail
  • RRA Advanced Half Quad
  • RRA Wraparound Quad
• Muzzle Device:
  • Long A2 Flash Hider
  • Tactical Long A2 Flash Hider
  • Smith Vortex Flash Hider
  • RRA Military Style Brake
  • RRA Tactical Brake
• Charging Handle:
  • with Badger Tactical Latch
  • RRA Ambi Charging Handle
  • Gas Buster with Big Latch
  • BCMGunfighter / Small Latch
  • BCMGunfighter / Medium Latch
  • BCMGunfighter / Large Latch
• Bolt Carrier Group:
  • Chrome Bolt Carrier Group
• Front Sight/Gas Block
  • Gas Block Sight Base
  • Gas Block/Detachable Front Sight
  • RRA Flip Front Sight Gas Block
• Barrel:
  • Chrome Lined 1:9
  • Chrome Lined 1:9 Lightweight
  • Stainless Steel, Wylde 1:8