weapons system vs weaponry

weapons system and weaponry both are nouns.

Word	Noun	Adjective	Verb	Adverb
weapons system	Yes	No	No	No
weaponry	Yes	No	No	No

As nouns, weapons system and weaponry are synonyms defined as:

Other synonyms of weapons system include arms, implements of war, munition.

weapons system (noun)	weaponry (noun)
weapons considered collectively	weapons considered collectively