This 7.62x35/300 AAC Upper Assembly comes ready to fire right out of the box upon installation onto any standard AR-15 lower receiver. The upper receiver group is assembled from premium components into a high performance-package.
The upper assembly comes equipped with a 4150 chrome moly steel barrel 1 in 9″ twist rifling.

Information
Upper Receiver: A3 Flat-Top, Forged 7075-T6 Aluminum
Barrel Length: 10.5″
Barrel Contour: M4
Barrel Material: 4150 Chrome Moly Steel
Muzzle Thread Pattern: 5/8 x 24
Chrome Lined: No
Barrel Finish: Parkerized
Twist Rate: 1 in 9″
Chamber: 7.62x35/300 AAC
M4 Feed Ramps: Yes
Muzzle Device: A2
Gas System Length: Carbine
Gas Block Diameter: 0.750″

Handguard: Quad Rail, Rifle Length, Free Float
Bolt Carrier Assembly Included: No
Bolt Carrier Type: Commercial
Charging Handle: No

Enhanced Black Nitride BCG can be added for $109.00 once on the site.