Hitscan

Hitscans are fired by all bullet-firing weapons in the Call of Duty series, save for the Barrett .50 Cal in One Shot One Kill, the Barrett .50 Cal with a Thermal Scope in Of Their Own Accord, and some machine gun turrets. They travel in perfectly straight lines at infinite velocities and are infinitely thin. They only disappear if all damage is lost during wall penetration, they hit a level's boundary, or in the case of shotguns, at a fairly short pre-set range.