Firearms have played a key role in human history and they clearly remain a ubiquitous part of society worldwide today. We see handguns carried by our law officers, long guns by hunters, and even larger weapons by members of the armed services. There is no denying that firearms are a part of our everyday lives. Today, firearms are by far the most common weapon used for deadly assault and are involved in an overwhelming number of robberies and other types of violent and assault crimes . When firearms are used in the commission of a real-life crime, forensic science plays a central role in linking a firearm and a criminal together.
Gun. A gun is a weapon that projects its projectile by the action of a burning propelling charge. In a closed chamber a propellant charge burns more vigorously under pressure. The gun provides the chamber in which the charge burns.
Projectile. A projectile is an elongated object, such as a bullet, that is propelled from a gun by a rapidly burning, low explosive propelling charge. It is fitted with a soft metal rotating (driving) band or bands near its base which is designed
According to Ordnance Field Guide some definitions is given as –
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