7.5" Free-Floated KEYMOD .223 / 5.56 AR-15 Upper Receiver - Magpul FDE

$ 427.00

Building your own custom free-floated AR-15 Pistol upper receiver is a snap when you have all of the right parts. It's even easier when someone has already done the legwork to source all of the components, made sure they are of the highest quality and fit, BUILDS AND TESTS THE UPPER RECEIVER and then put them all into a nice little package for you. 

Well that's exactly what we have done and it's absolutely awesome! 

Each complete upper receiver sold by Ground Zero Precision is assembled by one of our certified AR-15 technicians to our rigorous specifications, range tested for functionality and accuracy and comes ready to pop onto your lower receiver.

Components and Specifications:

Barrel - 

Ground Zero Precision's Premium .223 / 5.56 "Wylde" chambered 7.5 inch Modern Countour Series Barrel is precision CNC machined from 4150 Chrome Moly Vanadium steel with a corrosion resistant Parkerized finish and M4 feed ramp extension. Pistol length gas system.

Barrel Specifications:

Length 7.5"
Material 4150 Chrome Moly Vanadium
Profile Modern
Finish Corrosion Resistant Parkerized - Black
Gas System Length Pistol
Gas Block Journal .750"
Twist Rate 1:7
Muzzle 1/2 X 28 Threaded
Weight 10 oz

 

 Upper Receiver:

Ground Zero Precision upper receivers are manufactured for us in the United States by a major military and NASA contractor to U. S. Military Specification. Forged from 7075 T-6 Aluminum. Cerakoted in Magpul Flat Dark Earth 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
  • M4 Upper Receiver with M4 Feed Ramps
  • 1913 Picatinny Rail Flat Top
  • Multi-Caliber Capable
  • Cerakote - Magpul Flat Dark Earth
  • Mil-Spec Ejection Port Cover - Caliber Marked
  • Mil-Spec Ejection Port Hinge Pin
  • MIl-Spec Ejection Port Hinge Pin C-clip
  • Mil-Spec Ejection Port Spring
  • MIl-Spec "Target" Forward Assist - Salt Bath QPQ Nitride Finish
  • Mil-Spec Forward Assist Spring

Additional Components and Specifications:

  • 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
  • 1/2 X 28 "Bird Cage" Flash Suppressor - Salt Bath QPQ Nitride Finish
  • Mil-Spec Charging Handle - 7075 T-6 Aerospace Grade Aluminum, Hard Coat Anodized (Black) to MIL-A-8625
  • Seamless Stainless Steel Pistol Length Gas Tube
  • Mod 1 .750 Steel Micro Gas Block - Phosphate Finish (Black)

 

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