Shotgun is a firearm that is usually designed to be fired from the shoulder, which uses the energy of a fixed shell to fire a number of small spherical pellets called shot or a solid projectile called a slug. Most shotguns are chambered for 12 gauge buckshot shells.
Shotguns come in semi-automatic, pump-action, break-action (side-by-side double barrel, over/under double barrel, quadruple barrel) and fully automatic variants.
Shotguns are very deadly in close range. Upon pulling the trigger, several pellets are fired in a spread pattern. A few shotguns can use slugs which are solid projectiles for long range shooting.
Most of the shotguns that released in CF: Legends are semi-automatic, but some of them are pump-action or break-action and are generally more powerful as well as more stable & accurate than the semi-automatic shotguns.