Barrel Material: Nitride /Melonite 4150 cmvs ( Rated for up to 50,000 Round Life Expectancy)**
**Depending upon usage of semi or full auto style shooting.**
Muzzle Thread Pattern: 1/2"-28
Barrel Finish: Nitride Finish Ultra Black
Twist Rate: 1 in 9"
Chamber: 5.56 NATO
Bolt Carrier: None
Muzzle Device: Davidson Defense AR-15 1/2X28 Steel 10 Port Custom Anti Rise Muzzle Brake Gas System Length: Carbine
Gas Block Diameter: 0.750"
Handguard: 10’0M Davidson Defense M-Lok Ultra Lite Premium Handguard
DOES NOT INCLUDE BCG OR CHARGING HANDLE
Please note: If the listing says "in-stock" it means we have all of the items in stock. Our assembled upper receivers are made to order, and as such, it may take up to 10 business days for your order to be ready to ship out. If that is a problem, please email or call us to let us know!