diameter, are controlled under the Firearms Act, and require a firearms certificate to possess, which is very strictly regulated. Legal uses in the UK include, but are not restricted to, practical shotgun enthusiasts as members of clubs and at competitions, such as those run by or affiliated to the UKPSA. United States Rifled barrels for shotguns are an unusual legal issue in the United States of America. Firearms with rifled barrels are designed to fire single projectiles, and a firearm that is designed to fire a single projectile with a diameter greater than .50 caliber (12.7 mm) is considered a destructive device and as such is severely restricted. However, the ATF has ruled that as long as the gun was designed to fire shot, and modified (by the user or the manufacturer) to fire single projectiles with the addition of a rifled barrel, then the firearm is still considered a shotgun and not a destructive device. In some areas, rifles are prohibited for hunting animals such as deer. This is generally due to safety concerns. Shotgun slugs have a far shorter maximum range than most rifle cartridges, and are safer for use near populated areas. In other areas, there are special shotgun-only seasons for deer. This may include a modern slug shotgun, with rifled barrel and high performance sabot slugs, which provides rifle-like power and accuracy at ranges over . References External links Slug Guns for Deer, Game and Fish magazine. Shotgun slugs, Chuck Hawks. Shotgun slugs, what are they and how do they work?, Smallbore Shotgun. Paramilitary cartridges Shotgun shells da:Haglpatron de:Flintenmunition#Flintenlaufgeschosse