"Grease gun" is a nickname, not a classification. "Storm rifle" was the name of a gun, "assault rifle" is a class was derived from its name. >So, excepting terms made up in the popular press and by the ignorant But it wasn't! Just because they sometimes hijack it, does not make it so. >The initial purpose of the Barret .50 cal was a precision long range target rifle. It became the M82, an "anti material rifle" after the military adopted it The history of Barrett looking to build a semi-auto civvie fungun is irrelevant, but a fun story. M82 is the name/designation, "anti-material rifle" is the military classification. If you can't wrap your head around the relationship between designation and classification, then I don't know what to tell you.