military vs assault gun

military and assault gun both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
assault gun	Yes	No	No	No

military (noun)	assault gun (noun)
the military forces of a nation	an armored vehicle with the chassis of a tank (but no turret) and a large gun; used as an antitank weapon and to support infantry
	any of the automatic rifles or semiautomatic rifles with large magazines designed for military use

military (adjective)	assault gun (adjective)
associated with or performed by members of the armed services as contrasted with civilians
characteristic of or associated with soldiers or the military
of or relating to the study of the principles of warfare