16" .223 / 5.56 Complete AR15 Upper Receiver with 15" Tac-Hunter Keymod Free-Float Handguard - FREE SHIPPING

$ 448.49 $ 483.69

Complete Free Float AR 15 Upper Receiver KeymodStrong, Reliable, Rock Solid Performance. Shot after shot. Built for duty under the most extreme conditions with zero corners cut. With it's beautiful black phosphate finish light contour series .223 / 5.56 NATO barrel nestled under our 15" Tac-Hunter Mod 2 KEYMOD modular rail this complete upper receiver a sight to behold. Form meets function. A true beast veiled in beauty. With the push of two pins you can convert your boring, ho-hum rifle into a true tack driving masterpiece capable firing both .223 and 5.56 ammunition without losing accuracy between calibers.

Each complete upper receiver sold by Ground Zero Precision is assembled by one of our certified AR15 technicians to our rigorous specifications, range tested for functionality and accuracy and comes ready to pop onto your lower receiver and go. Please understand that these are built to order and must pass inspection and the range test before they ship. This takes time so please allow up to two weeks from order to shipment.

Components and Specifications:
Barrel - 

Ground Zero Precision's Premium .223 / 5.56 "Wylde" chambered 16 inch Light Contour Series Barrel is precision CNC machined from 4150 Chrome Moly Vanadium steel with a durable, corrosion resistant Black phosphate  Finish with polished M4 feed ramp extensions for easy and reliable feeding of multiple ammunition types and brands. Carbine length gas system.

Barrel Specifications:

Length 16"
Material 4150 Chrome Moly Vanadium
Profile Modern / HBAR
Finish Black Phosphate
Gas System Length Carbine
Gas Block Journal .750"
Twist Rate 1:8
Muzzle 1/2 X 28 Threaded
Weight 29oz

 

Bolt Carrier Group:
  • 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
  • QPQ Nitride Bolt Carrier Group (Option 3): Ground Zero Precision Dead Bolt +P Premium Full-Mass Bolt Carrier Group - Carrier: 8620 Steel, Black QPQ Nitride finish, Chrome Lined, Magnetic Particle Inspected, High Pressure Tested - No Logo, Bolt: 158 Carpenter Steel, Magnetic Particle Inspected, High Pressure Tested, Black QPQ Nitride Finish, Gas Key: 4041 Steel, Grade 8 Fasteners, Staked to Mil-Spec
    Upper Receiver:

    Ground Zero Precision upper receivers are manufactured for us in the United States by a major military and NASA contract to U. S. Military Specification. Forged from 7075 T-6 Aluminum and hard coat type III class III anodized in matte black for durability and reliability in the most extreme of environments.

    Upper Receiver Materials and Specifications:

    • Manufactured to U. S. Mil-Spec
    • Forged 7075 T-6 Aluminum
    • M-4 Upper Receiver with M-4 Feed Ramps
    • 1913 Picatinny Rail Flat Top
    • Multi-Caliber Capable
    • Hard Coat Anodize Type III Class II
    • Matte Black Finish
    • Mil-Spec Ejection Port Cover
    • Mil-Spec Ejection Port Hinge Pin
    • MIl-Spec Ejection Port Hinge Pin C-clip
    • Mil-Spec Ejection Port Spring
    • MIl-Spec "Target" Forward Assist - QPQ Nitride Finish
    • Mil-Spec Forward Assist Spring
    • Mil-Spec AR15 Charging Handle - 7075 T6 Aluminum - Hard Coat Anodized 
    Additional Components and Specifications:
    • 1/2 X 28 "Bird Cage" Flash Suppressor - QPQ Nitride Finish
    • Seamless Stainless Steel Carbine Length Gas Tube
    • Stainless Steel .750 Ultra-Low Profile Gas Block - Natural Stainless Finish