| A | B |
| sodium rhodizonate | chemical that checks for lead residue usually on clothing |
| Greiss Test | checks for nitrates, nitrites |
| GSR | Gun Shot Residue contains barium, antimony and lead |
| rifling | process of putting spiral ridges in barrel of gun |
| lands and grooves | product of rifling |
| impression | As a tool hits a softer surface, the shape of the tool and imperfections in its surface may be left behind as an impression |
| trajectory | in the study of ballistics, term used to determine angle, speed and location of projectile |
| shotgun | barrel lacks rifling |
| revolver | cartridge is Not ejected during firing process |
| pistol | fully loaded this type of gun can hold 8 - 15 cartridges |