A shooting range, firing range, gun range or shooting ground is a specialized facility, venue, or field designed specifically for firearm usage qualifications, training, practice, or competitions. Some shooting ranges are operated by military or law enforcement agencies, though the majority of ranges are privately owned by civilians and sporting clubs and cater mostly to recreational shooters. Each facility is typically overseen by one or more supervisory personnel, variously called a range master or range safety officer (RSO) in the United States, or a range conducting officer (RCO) in the United Kingdom. Supervisory personnel are responsible for ensuring that all weapon safety rules and relevant government regulations are followed at all times. Shooting ranges can be indoor or outdoor, and may be restricted to certain types of firearm that can be used such as handguns or long guns, or they can specialize in certain Olympic disciplines such as trap/skeet shooting or 10 m air pistol/rifle. Most indoor ranges restrict the use of high-power calibers, rifles, or fully automatic weapons. A shooting gallery is a recreational shooting facility with toy guns (usually very low-power airguns such as BB guns or airsoft guns, occasionally light guns or even water guns), often located within amusement parks, arcades, carnivals or fairgrounds, to provide safe casual games and entertainment for the visiting crowd by prizing customers with various dolls, toys and souvenirs as trophies. Type In urban areas, most shooting ranges will be at indoor facilities. Indoor ranges offer sheltering from inclement weather conditions and can be operated around the clock under a controlled environment. Outdoor shooting ranges are typically found away from populated areas due to concerns of safety, noise pollution and soil contamination. Indoor range Indoor shooting ranges are usually constructed as standalone structures, though they may be housed in larger buildings in isolated areas such as the basement. The basic components of most indoor ranges consist of firing lines/lanes, targets and a bullet trap/"backstop" (which prevents stray shots and overpenetrations). Design considerations may vary depending on planned use but they all must address the basic requirements for operating the range safely, and that is provide ballistic protection, safety controls, proper ventilation, acoustic isolation and appropriate lighting. Structural components Firing range walls are usually constructed of poured concrete, precast concrete or masonry blocks. The walls must be sufficiently impenetrable and provide adequate ballistic protection from stray shots and back-splatter. Floors are constructed from