A shotgun is a long-barrel firearm designs to shoot a straight walled cartridge. They know them as a shotshell. This usually discharges numerous small spherical pellet. Like sub projectiles which are shots, or sometimes a single solid projectile called slug. Shotguns are most commonly smoothbore firearms. This means their gun barrels have no riflings on the inner walls. But rifle barrels for shooting slugs (slug barrels) are also available. Buy Combat Shotguns Online
Shotguns come in a wide variety of calibers ranging from 5.5 mm (.22 inch) to up to 5 cm (2.0 in), though the 12-gauge (18.53 mm or 0.729 in) and 20-gauge (15.63 mm or 0.615 in) bores are by far the most common. Almost all are breechloading, and can be single-barreled, double-barreled or in the form of combination guns. Like rifles, shotguns also come in a range of different action types, both single-shot and repeating. For non-repeating designs, over-and-under break action shotguns are by far the most common variant. Although revolving shotguns did exist, most modern repeating shotguns are either pump-action or semi-automatic, and also fully automatic, lever-action or bolt-action to a lesser extent.