Homonym: Mil (Military)
A "mil" is a unit of measurement commonly used in various fields, particularly in manufacturing and engineering. It is equal to one-thousandth of an inch (0.001 inches) and is often used to specify the thickness of materials such as plastic films, coatings, and sheets.
In the context of firearms, a "mil" can also refer to a unit of angular measurement, where one mil is equal to 1/6400 of a circle. This measurement is often used in military and tactical applications for range estimation and adjustments in aiming devices like scopes.