Important+Definitions-MD


 * Ballistics** - the study of projectiles(bullets) and firearms
 * Barrel** - the long, metal tube that guides a projectile out of a firearm
 * Breech** - the end of the barrel attached to the firing mechanism of a firearm where the cartridge is loaded and unloaded
 * Bullet -** the projectile that is released when a firearm is discharged
 * Caliber** - a measure of the inside diameter of a firearm barrel
 * Cartridge** - a case that holds a bullet, primer powder, and gunpowder
 * Firearm** - a weapon capable of firing a projectile using a confined explosive as a propellant
 * Fully Automatic -** a firearm with a clip-fed mechanism that fires repeatedly as long as the trigger is pressed
 * Gunshot Residue(GSR)** - the tiny particles expelled from a firearm when it is fired
 * Lands and Grooves** - the ridges(lands) and depressions(grooves) found on the inside of a firearm's barrel that are created when the firearm is manufactured
 * Muzzle** - the end of the barrel from which the projectile exits a firearm
 * Pistol** - a handheld firearm
 * Revolver** - a pistol with a revolving cylinder
 * Rifle -** a firearm that has a long barrel; a long gun
 * Rifling** - the spiral pattern of lands and grooves in the barrel of a firearm
 * Semiautomatic** - a pistol with a clip-fed mechanism that fires one shot per pull of the trigger; the empty cartridge ejects and the next cartridge advances automatically.
 * Shell Casing** - the metal (usually brass) housing for the gunpowder of a firearm
 * Trajectory** - the path of flight of a projectile