Diamondback Firearms DB10, Semi-automatic Rifle, AR-10, 308 Winchester, 16 Barrel, Cerakote Finish, Black/Green, Multicam Black B5 Grip and Stock, 20 Rounds, 1 Magazine 1080C281 The DB10 Distributor Exclusive Series is a line of DB10 rifles that are built specifically to the specifications of their distributors and can be obtained by a dealer purchasing these rifles through the distributor which the gun was built for.