the Korean War, American and French jungle patrols used shotguns during the Vietnam War, and shotguns saw extensive use as door breaching and close quarter weapons in the early stages of the Iraq War, and saw limited use in tank crews. Many modern navies make extensive use of shotguns by personnel engaged in boarding hostile ships, as any shots fired will almost certainly be over a short range. Nonetheless, shotguns are far less common in military use than rifles, carbines, submachineguns, or pistols. On the other hand, the shotgun has become a standard in law enforcement use. A variety of specialty less-lethal or non-lethal ammunitions, such as tear gas shells, bean bags, flares, explosive sonic stun rounds, and rubber projectiles, all packaged into 12-gauge shotgun shells, are produced specifically for the law enforcement market. Recently, Taser International introduced a self-contained electronic weapon which is fired from a standard 12-gauge shotgun. The shotgun remains a standard firearm for hunting throughout the world for all sorts of game from birds and small game to large game such as deer. The versatility of the shotgun as a hunting weapon has steadily increased as slug rounds and more advanced rifled barrels have given shotguns longer range and higher killing power. The shotgun has become a ubiquitous firearm in the hunting community. Legal issues Globally, shotguns are generally not as heavily regulated as rifles or handguns, likely because they lack the range of rifles and are not easily concealable as handguns are; thus, they are perceived as a lesser threat by legislative authorities. The one exception is a sawed-off shotgun, especially a lupara, as it is more easily concealed than a normal shotgun. Australia Within Australia, all shotguns manufactured after 1 January 1901 are considered firearms and are subject to registration and licensing. Most shotguns (including break-action, bolt-action and lever-action shotguns) are classed as "Category A" weapons and, as such, are comparatively easy to obtain a licence for, given a legally recognised "legitimate reason" (compare to the British requirement for "good reason" for a FAC), such as sport shooting or hunting. However, pump-action and semi-automatic shotguns are classed as "Category C" (magazine capacity no more than 5 rounds) or "Category D" (magazine capacity more than 5 rounds) weapons; a licence for this type of firearm is, practically speaking, unavailable to the average citizen due to the difficulty and red tape of acquiring one. For more