Shotguns refer to any gun made for close quarters battle (CQB). They possess average rates of fire, have low ammo and poor accuracy, but are very deadly at close range. They are used oftenly by demolitionists. There are two shotguns in CoD: WaW: the M1897 Trench Gun, an American pump-action shotgun, and the Double-Barreled Shotgun, a two-shot, slightly more powerful shotgun.
Details
Each are great for close-range engagements, and can be given a Grip attachment, though only the Trench Gun can have a Bayonet. In conjunction with a perk like Deep Impact, it can be as lethal as closed-range fighting as it is with cover-free areas. With Stopping Power, it becomes ridiculousy overpowered, and adds some amount of 'kill distance'. Since it is so dangerous to anyone, even Juggernauts, it is advised to use long-range tactics to counter the shooter.