A shotgun is not subject to section 1 of the Firearms Act 1968, but will require a shotgun certificate, if it is a smooth-bore gun (not being an air gun) which:
- has a barrel of 24 inches or more in length;
- does not have a barrel with a bore that exceeds 2 inches in diameter;
- does not have a magazine or has a detachable magazine that is incapable of holding more than 2 cartridges; and
- is not a revolver gun.
Shotguns of either a self-loading or pump-action style, with a barrel less than 24 inches in length or are less than 40 inches in length overall, and have a fixed magazine that can hold 2 or more cartridges, are classed as shotguns to which section 1 of the Firearms Act 1968 refers and are subject to the restriction of a firearms certificate.
Please note that all calls to police involving firearms are treated as if it is a genuine firearm so be aware that if you do wave an imitation firearm around you could find yourself surrounded by firearms officers pointing real weapons at you.