Espero que ajude. Definição (http://idioms.thefreedictionary.com/stick to guns):

stick to your guns (British, American & Australian, informal, American, informal)
to refuse to change your ideas although other people try to make you change them. David's family were against him becoming an actor but he stuck to his guns. Stand by your guns and don't let them talk you into working full time if you don't want to.