7.5" 300 BLACKOUT AR15 Upper Receiver w/ 4" Free Float Hand Guard & Sights - FREE SHIPPING

$ 375.81

This complete AR15 upper receiver comes with everything you need already installed. Just pop the pins on your pistol or registered SBR lower, pop on this upper and you're ready to roll.

Each Ground Zero Precision complete upper receiver is assembled by one of our certified AR15 technicians to our rigorous specifications and comes ready to pop onto your lower receiver and go.

Every upper receiver we build must pass three thorough inspections and is test fired for functionality and accuracy. Please allow for additional order to ship time as we build these to order.

Includes all of the following (Assembled):

  • Ground Zero Precision A4 Flat-Top 7075-T6 Aluminum Upper Receiver with M4 Feed Ramps
  • 7.5" Modern Profile 300 Blackout Chambered, 1:7 twist Barrel - Black Phosphate Finish
  • Ground Zero Precision Premium Full-Mass M16 Bolt Carrier Group - Black Phosphate, Chrome Lined, Magnetic Particle Inspected, High Pressure Tested
  • Ground Zero Precision Mod 2 .750 Same Plane Rail Height Railed Gas Block
  • Seemless Stainless Pistol Length Gas Tube with Roll Pin
  • A2 "Birdcage" 5/8 X 24 Flash Hider with Crush Washer - QPQ Nitride Finish
  • Mil-Spec 7075-T6 Aluminum Charging Handle - Hard Coat Anodized Finish
  • Mil-Spec Ejection Port Cover Door Assembly with Pin, C-Clip and Spring
  • Mil-Spec "Target" Forward Assist with Spring and Roll Pin - QPQ Nitride Finish
  • Ground Zero Precision 4" Knurled Free Float Tube 7075 T-6 Aluminum, Hard Coat Black Anodized Finish
  • Ground Zero Precision Polymer Pop-Up Front & Rear BUIS