A mark produced when one surface slides across another surface
Abrasion Mark
The study of bullets and firearms
Ballistics
The long, metal tube that guides a projectile out of a firearm
Barrel
The interior of a barrel
Bore
The rear part of a barrel
Breechblock
The projectile that is released when a firearm is discharged
Bullet
The bore diameter of a rifled firearm, usually expressed in hundredths of an inch or millimeters – for example, .22 caliber or 9 millimeter
Caliber
The process of determining the distance between the firearm and the target, usually based on the distribution of powder patterns or the spread of a shot pattern
Distance Determination
The process of determining the distance between the firearm and the target, usually based on the distribution of powder patterns or the spread of a
Distance Determination
The tiny particles expelled from a firearm when it is fired
Gunshot Residue (GSR)
A mark or impression made by a tool on a softer surface
Indentation Mark –
The end of the barrel from which the projectile
Muzzle
A pistol with a revolving cylinder
Revolver
The spiral grooves etched into the bore of a firearm barrel that spin the projectile when it is fired
Rifling
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
Semiautomatic