Firearm Puzzle
A firearm is a portable gun, being a barreled weapon that launches one or more projectiles often defined by the action of an explosive. The first primitive firearms were invented in 13th century China when the man portable fire lance (a bamboo or metal tube that could shoot ignited gunpowder) was combined with projectiles such as scrap metal, broken porcelain, or darts/arrows. The technology gradually spread through the rest of East Asia, South Asia, Middle East and then into Europe. In older firearms, the propellant was typically black powder, but modern firearms use smokeless powder or other propellants. Most modern firearms (with the notable exception of smoothbore firearms) have rifled barrels to impart spin to the projectile for improved flight stability.
Modern firearms are typically described by their bore diameter (7.5mm) or calibre (.357) or gauge (12 ga.), the type of action employed (muzzle, breech, lever, bolt, pump, revolver, semi-automatic, or automatic) together with the usual means of deportment (hand-held or mechanical mounting). They may be further distinguished by reference to the type of barrel used (rifled) and the barrel length (19 inch), the design's primary intended target (anti-aircraft), or the commonly accepted name for a particular variation (Gatling gun).
The Firearm Puzzle HD is a collectiong of high quality gun pictures, the features is:
1) A variety of topics, contains "AK-47", "M82 Barrett rifle", "Browning Hi-Power", "M4 carbine", "M1911 pistol", "Revolver"
2) difficulty choose, from 2x2 to 11x11
3) Multitouch support, you can play with your friends or kids
4) weekly update
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