Gun laws in Norway incorporates the political and regulatory aspects of firearms usage in the country. Citizens are allowed to keep firearms (most commonly for hunting, sports shooting). The acquisition and storage of guns is regulated by the state. Regulations Firearms in Norway are regulated by the Firearm Weapons Act, with a new secondary law in effect 1 July 2009 providing more detailed regulation. The act covers all firearms, air pressure weapons, and some "exotic arms" as the act defines. All weapons that would be regulated must have two things in common: they must eject a projectile mechanically and use some form of propellant to perform the ejection. The act includes military type weapons, flare guns and replicas that can "easily" be converted to working firearms. Guns owned and operated under the responsibility of the armed forces and the police are exempt from the civilian weapons act. The detailed interpretation of the law is laid out in another regulation. Suppressors are not regulated under Norwegian law, and may be purchased by anyone. Suppressors are also legal while hunting, and seen as a necessity for more comfortable shooting and to lower the environmental impact of noise. Types of civilian-owned guns Norway has a large population of hunters. Semi-automatic and bolt-action rifles, as well as shotguns, make up the better part of the guns in civilian homes. There is a total ban on automatic firearms for civilians, unless they fall into the collector category. Modification of semi-automatic guns into fully automatic without the consent of the police is a felony crime. Handguns have some calibre restrictions. A Smith & Wesson Model 500, for example, is illegal due to its high power, but other, less powerful guns, are legal as they are used in sports shooting. Norway has a long tradition of high-end sports shooting competitions, especially rifle shooting. Each calibre must be used in some type of competition to be allowed. Also, there is a restriction on the number of weapons an owner can have for each calibre. For recreational shooters, only one gun is allowed in each calibre. For professional and semi-professional shooters, a spare gun is allowed. A recreational shooter is only allowed to own four different handguns. To obtain more, documentation on extensive involvement in sport shooting is needed. Ownership Gun ownership is restricted in Norway, unless one has officially documented a use for the gun. By far the