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improvised firearm
An improvised firearm is a firearm manufactured other than by a firearms manufacturer or a gunsmith, and is typically constructed by adapting existing materials to the purpose. They range in quality from crude weapons that are as much a danger to the user as the target, to high-quality arms produced by cottage industries using salvaged and repurposed materials.〔, Chapter 4〕〔(India's corner of mystery: Bihar's poor and lawless )〕
Improvised firearms are commonly used as tools by criminals and insurgents and are often associated with such groups.〔(【引用サイトリンク】title=Homemade Filipino Gun )〕
Other uses for improvised firearms include self-defense in lawless areas, or in poor rural areas for hunting game.
==Construction==
The essential part of any improvised firearm is the barrel and chamber. For small, low-pressure cartridges, like the common .22 caliber (5.5 mm) rimfire cartridges, even very thin-walled tubing will suffice. Author Harlan Ellison describes the zip guns used by gangs in 1950s New York City as being made from tubing used in coffee percolators or automobile radio antennas, strapped to a block of wood to serve as a handle. A rubber band provides the power for the firing pin, which is pulled back and released to fire. The use of such weak tubing results in a firearm that can be as dangerous to the shooter as the target; the poorly fitting smoothbore barrel provides little accuracy and is liable to burst upon firing.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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