firearms

what part of the revolver is this?

hammer

what part of the revolver is this?

chamber

what part of the revolver is this?

barrel

what part of the revolver is this?

front sight

what part of the revolver is this?

muzzle

what part of the revolver is this?

fingerguard

what part of the revolver is this?

trigger

what part of the revolver is this?

grip

what is the difference between automatic and semi-automatic gun?

automatic-continuosly fires rounds as long as the trigger is held down and semi automatic- fires one round per trigger pull

how does a gun fire from trigger pull to the bullet exiting the gun?

trigger pull, firing pin strike, primer ignition, powder ignition, pressure buildup, bullet travel, exit from barrel

What does NIBIN stand for? Know what can be compared in NIBIM?

NIBIN stands for National Integrated Ballistic Information Network. It compares markings left on fired bullets and cartridge cases to aid in criminal investigations.

Know the difference between exterior, interior and terminal ballistics

Exterior ballistics deals with the flight path of a projectile, interior ballistics focuses on what happens inside the firearm when it is fired, and terminal ballistics involves the behavior of a projectile upon impact with a target

Know the difference in entrance and exit wounds

Entrance wounds are where the bullet enters the body, while exit wounds are where the bullet exits the body after passing through it.

On what are extractor and ejection marks found?

found on cartridge casings where the extractor claw grips the rim, while ejection marks are found on casings where the ejector mechanism pushes them out of the firearm

Know the difference between full metal jacket, hollow-point, plastic tipped and wad-cutter

Full metal jacket bullets have a metal coating covering the entire bullet, hollow-point bullets have a hollowed-out tip designed to expand upon impact, plastic-tipped bullets have a polymer tip to enhance aerodynamics and terminal performance, and wad-cutter bullets have a flat front and are often used in target shooting

Know how firing pin marks can be used to identify a firearm

marks of imperfections during manufacturing, corrosion and damage

Define ballistics

the study of bullets and firearms

Define rifling

arrangement of spiral groves on the inside of the barrel

Know the formula for velocity

V=D/T

Define trajectory

refers to the path followed by a bullet moving under action of given forces

Define gunshot residue

substance dispersed from bullet consisting of burned and unburned particles

The distribution of powder can be analyzed to help determine what?

type of weapon, distance between muzzle and target based on patterns or spread