sight setting vs gunsight

sight setting and gunsight both are nouns.

Word	Noun	Adjective	Verb	Adverb
sight setting	Yes	No	No	No
gunsight	Yes	No	No	No

As nouns, gunsight is a hypernym of sight setting; that is, gunsight is a word with a broader meaning than sight setting:

sight setting: the adjustment of a gunsight for elevation and windage on a particular range under favorable light conditions
gunsight: a sight used for aiming a gun

Other hypernyms of sight setting include gun-sight.

sight setting (noun)	gunsight (noun)
the adjustment of a gunsight for elevation and windage on a particular range under favorable light conditions	a sight used for aiming a gun