stick to one's guns, to

stick to one's guns

Fig. to remain firm in one's convictions; to stand up for one's rights. (Fig. on a soldier remaining in place to fire a gun even when all appears to be lost.) I'll stick to my guns on this matter. I'm sure I'm right. Bob can be persuaded to do it our way. He probably won't stick to his guns on this point.
See also: gun, stick

stick to one's guns

Hold fast to a statement, opinion, or course of action, as in The witness stuck to her guns about the exact time she was there. This expression, originally put as stand to one's guns, alluded to a gunner remaining by his post. Its figurative use dates from the mid-1800s.
See also: gun, stick

stick to one's guns, to

To persist, to stand firm. Originally this term was (and in Britain still is) to stand to one’s guns and referred to a gunner’s obligation to remain at his post. By the mid-eighteenth century it was being used figuratively, as by James Boswell (Life of Johnson, 1791): “Mrs. Thrale stood to her gun with great courage in defense of amorous ditties.”
See also: stick