<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2012) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2012) (Learn how and when to remove this template message) </Td> </Tr> <P> BB guns are a type of air guns designed to shoot metallic ball projectiles called BBs--metal balls approximately the same size as the 0.180 inches (4.6 mm) "BB" lead birdshots . Modern BB guns usually have a barrel with a bore caliber of 4.5 mm (0.177 in) and are available in many varieties . These guns usually use steel BB shots, either zinc - or copper - plated to resist corrosion, and measuring 4.3 to 4.4 mm (0.171 to 0.173 in) in diameter and 0.33 to 0.35 g (5.1 to 5.4 gr) in weight . Some manufacturers still make the traditional lead balls around 0.48 to 0.50 g (7.4 to 7.7 gr) in weight and slightly larger in diameter, which are generally intended for use in rifled barrels due to lead having better malleability . </P> <P> The term "BB gun" is often incorrectly used to describe a pellet gun, which fires non-spherical projectiles . Although in many cases a steel BB can be fired in a pellet gun, pellets usually cannot be fired in a gun specifically designed for BBs . Similarly, the term is also often used incorrectly to address airsoft guns, which shoot plastic balls that are larger but much less dense and have significantly lower ballistic performance . </P>

Is an air gun the same as a bb gun
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