Заранее спасибо,
Николй.

Traditionally American. Usually a "toy" gun that shoots BB's usually intended for youths and carnivals. Rarely applicable to "Adult" airguns. In recent years a number of European rapid fire CO 2 pistols have appeared. Most use lead ball ammunition; some use steel BB's.
home.hiwaay.net/~ispellan/AirGlossary.html

an air gun in which BBs are propelled by compressed air
wordnet.princeton.edu/perl/webwn

A BB gun is a pneumatic gun usually powered by compressed gas, electric revolution, or a spring. Most BB guns are shaped like normal guns but can look like toys. Some have reservoirs to store ammunition, some are breechloaders, and others are muzzleloaders. They use small round balls called BB's made of plastic or copper, usually .177 caliber (4.5 mm). Some also use shaped pieces of lead called pellets. ...
en.wikipedia.org/wiki/BB_gun