Ammunition and projectiles, explosives and fire works. A firearm is a device, which is used as a weapon, which projects either single or multiple projectiles at high velocity through a controlled explosion. The firing is achieved by the gases produced through rapid and confined burning of a propellant. This process of rapid burning is technically well known as deflagration. In older firearms, this propellant was typically black powder, but modern firearms use cordite, smokeless, or other propellants. Most modern firearms have rifled barrels to impart spin to the projectile for improved flight constancy. While most firearms are primarily used as weapons, some exist, which are used primarily as tools.
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