Shotgun

A shotgun is a long-barreled firearm designed to shoot a straight-walled cartridge known as a shotshell, which discharges either numerous small spherical projectiles called shot, or a single solid projectile called a slug. Shotguns are most commonly used as smoothbore firearms, meaning that their gun barrels have no rifling on the inner wall, but rifled barrels for shooting sabot slugs are also av... (Wikipedia)