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This Old Testament Firearms assembled 5.56 NATO "Close Quarters Battle" Upper Receiver Group is the perfect choice if you have wanted a pistol length upper but do not want the concussion and exaggerated flash signature that comes with a short-barreled 5.56/223 upper receiver!

This 5.56/.223 Upper Receiver Group consists of the following components:

  • 10.5" Nitride Finish Hitman Series 5.56 NATO Barrel
    • Carbine Length Gas System
    • 1/7 Twist
    • 1/2-28 Threaded
  • Strike Industries J-Compensator and OPPRESSOR Concussion Reduction Device
    • Quick Detach Mounting System
    • Designed Specifically For Short Barrel Rifles/Pistols To Direct Gasses Out The Front and Retain Linear Braking Functions 
    • Directs Flash and Sound Forward While Improving Overall Weapon Control
  • 9.85" OT Firearms Free Float MLOK Handguard
    • Allows The Use Of Oppressor CRD or Your Preferred Suppressor and Mount
  • OT Firearms Forged 7076-T6 M4 Upper Receiver
  • Nitride Finish Low-Profile Gas Block
  • Nitride Finish Pistol Length Gas Tube
  • Does NOT Include BCG / Charging Handle