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The Jacob Grey Ultralight Complete Upper Assembly was designed with the next generation AR-15 in mind. This AR-15 complete upper assembly is built around the 7075-T6 billet upper receiver specifically machined and cut in areas where excess material was unnecessary and areas that see excess use and wear, reinforced and strengthened to give a sleek, refined look, without losing the classic lines of the AR-15 platform. It comes standard with the JG designed free float 7-sided M-LOK hand-guard that is also lightweight and leaves plenty of room for customization or the addition of numerous accessories available for the AR-15 platform. The barrel is chambered in 5.56 NATO with a 1:7 twist rate. The barrel is machined from 4150 chrome moly steel and black Nitride finished for corrosion resistance and accuracy. Each barrel is individually head-spaced to the Carpenter 158 bolt. Combined with the 8620 steel carrier and black Nitride finish, this complete upper assembly is extremely reliable and smooth shooting.
Specifications for Jacob Grey Custom Ultralight 5.56 NATO Complete Upper Assembly:
Manufacturer: Jacob Grey Custom
Color: Black
Finish: Type III Class 2 Hardcoat Anodized
Fabric/Material: Aerospace Aluminum
Cartridge: 5.56x45mm NATO
Barrel Profile: Government
Gas System Length: Pistol Length
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-7
Handguard Type: Free-Float
Attachment/Mount Type: M-LOK
Gun Rail: M-LOK
Threads per Inch: 1/2x28
Muzzle Device: Brake
Gun Type: Rifle
Gun Make: AR Platform
Gun Model: AR-15
Weight: 7.7 oz
Bolt Carrier Group Included: MIL-SPEC
Charging Handle Included: MIL-SPEC
4M6-URC-GJUN1-556N75ULCUA
