A shotgun specifically set up to fire slugs will typically include:

• A rifled bore or rifled choke tube, which imparts spin to the slug and greatly improves accuracy compared with a plain smoothbore barrel.

• More precise sights, such as rifle-style iron sights or a scope/optic, instead of just a simple bead, to allow accurate aiming at longer ranges.

• An open or cylinder-style choke (or removable choke system) that is compatible with slugs, since excessive constriction can be unsafe or harm accuracy.