7.5" Free-Floated Keymod .223 / 5.56 AR-15 Upper Receiver with GZP Adjustable Gas - (75P25W-7TFPAG)
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, pressure and functionality tested and comes ready to pop onto your lower receiver.
Components and Specifications:
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.
|Material||4150 Chrome Moly Vanadium|
|Finish||Corrosion Resistant Parkerized - Black|
|Gas System Length||Pistol|
|Gas Block Journal||.750"|
|Muzzle||1/2 X 28 Threaded|
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 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
- M4 Upper Receiver with M4 Feed Ramps
- 1913 Picatinny Rail Flat Top
- Multi-Caliber Capable
- Hard Coat Anodize Type III Class II to MIL-A-8625
- 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 - Salt Bath QPQ Nitride Finish
- Mil-Spec Forward Assist Spring
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
The Atlas AR15 Keymod Free Float Rail features a slim profile for improved ergonomics and weight savings. With a static top rail optimized for mounting optics and multiple contact points for a hex key mounted modular rail system on the sides and bottom, the Atlas Rail is the ideal solution for any AR15 owner looking for speed and mission flexibility. It uses a hex key secured barrel nut clamp and proprietary barrel nut for even more weight savings and easy installation.
FREELOK Clamping System US. PAT. NO. 9,389,043 B1
The Atlas AR15 Keymod Rail features a non-indexing barrel nut and clamping system (FREELOK) that utilizes free floating tabs to secure the rail to the receiver. FREELOK provides both frictional and mechanical locking forces to create a rock-solid bond between the rail and barrel nut.
|Inner Diameter (in)||
|Type of Aluminum||
Hard Coat Anodized Finish
- 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
- Ground Zero Precision Ultra-Light Micro Adjustable Gas Block - 7075-T6 Aluminum - Hard Coat Anodized (Black) to MIL-A-8625
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