firearm types
short-barrelled firearm held and used with 1 hand
handgun
the metal housing (usually brass) for the gunpowder of a firearm
(shell) casings
the path of a propelled bullet, can be calculated by finding two reference points along the flight path of the projectile
(bullet) trajectory
True or false - firearms produce unique markings that match to a single/individual weapon
TRUE
the study of bullets and firearms.
ballistics
Category of firearms with longer barrels than most other types
long gun
the projectile that is released when a firearm is discharged
bullet
a measure of bullet size; the diameter of a bullet. Also corresponds to the inside diameter of a firearm's barrel
caliber
marks or scratches left on a **bullet** by the inside machining marks and wear patterns of a gun barrel
striations
burned/unburned particles and combustion residue produced as a result of firing a firearm.
this type of long gun shoots shells with pellets or slugs
shotgun
this substance is ignited, pushing the bullet from the casing into the barrel
gun powder
The lands and groove cause the bullet to _____ while it travels down and out of the barrel. Helps improve accuracy
spin
marks produced on the **casing/rim** when a cartridge case is fired in a firearm
breech marks
credited for creating the first handgun
Samuel Colt
this type of long gun fires bullets
rifle
found on the base of the cartridge, initiates combustion after it is struck with the firing pin
primer
a tube through which a bullet travels when a gun is fired
barrel
The unique mark that is stamped on the primer/rim after a gun is fired
firing pin marks
National Database that automates ballistics evaluations and provides actionable investigative leads
NIBIN (or NIST)
These are two types of handguns
pistol and revolver
Consists of the bullet and a case or shell that contains the gunpowder and the primer
cartridge
When the trigger is pulled the ________ will hit the base of the catridge, igniting the powder
firing pin
A way to determine the distance a victim was from the weapon is to examine the __________
GSR pattern
a firearm with a clip-fed mechanism that fires repeatedly as long as the trigger is pressed
fully automatic