9" Free Floated Ballistic Advantage 300 Blackout Complete AR-15 Keymod Upper Receiver With SLR Adjustable Gas (BA9TH73A) - FREE SHIPPING

$ 554.17

This complete 300 Blackout AR-15 pistol upper receiver features a premium 9" Ballistic Advantage barrel, SLR Rifleworks Sentry 7 adjustable gas block and comes with everything you need already installed. Just pop the pins on your pistol or registered SBR AR-15 lower receiver, pop on this upper and you're ready to roll.

Each complete Ground Zero Precision upper receiver is assembled by one of our certified AR-15 gunsmiths 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 7075 T-6 Aerospace Grade Aluminum Stripped Upper Receiver, Hard Coat Anodized (Black) to MIL-A-8625
  • Ballistic Advantage 9" Modern Profile 300 Blackout Barrel - 4150 CrMoV Steel, QPQ Nitride Finish, Magnetic Partical Inspected, High Pressure Tested - Pistol Gas 1:7 Twist
  • Phosphate Bolt Carrier Group (Option 1): Ground Zero Precision Dead Bolt +P Premium Full-Mass Bolt Carrier Group - Carrier: 8620 Steel, Black Phosphate finish, Chrome Lined, Magnetic Particle Inspected, High Pressure Tested - No Logo, Bolt: 158 Carpenter Steel, Magnetic Particle Inspected, High Pressure Tested, Black Phosphate Finish, Gas Key: 4041 Steel, Grade 8 Fasteners, Staked to Mil-Spec
  • Nib Bolt Carrier Group (Option 2): Ground Zero Precision Dead Bolt +P Premium Full-Mass Bolt Carrier Group - Carrier: 8620 Steel, Nickel Boron finish, Chrome Lined, Magnetic Particle Inspected, High Pressure Tested, Bolt: 158 Carpenter Steel, Magnetic Particle Inspected, High Pressure Tested, Nickel Boron Finish, Gas Key: 4041 Steel, Grade 8 Fasteners, Staked to Mil-Spec
  • SLR Rifleworks Sentry 7 Adjustable Micro Gas Block - .750 Dia., 4140 Steel Block with 4140 Nexturn Swiss Metering Screw, QPQ Salt Bath Nitride Finish - Black
  • Seemless Stainless Pistol Length Gas Tube with Roll Pin
  • Ground Zero Precision 7" Tac-Hunter Keymod Free Float Handguard - 7075 T-6 Aluminum, Hard Coat Anodized (Black) to MIL-A-8625
  • A2 "Birdcage" 5/8 X 24 Flash Hider with Crush Washer - Salt Bath QPQ Nitride Finish
  • Enhanced Mil-Spec 6-Position Carbine Buffer Tube - 7075 T-6 Aerospace Grade Aluminum, Hard Coat Anodized (Black) to MIL-A-8625
  • Mil-Spec Dust Cover Door Assembly with Pin, C-Clip and Spring
  • Mil-Spec Target Forward Assist with Spring and Roll Pin