From Longman Dictionary of Contemporary Englishgunsmithgun‧smith /ˈɡʌnˌsmɪθ/ noun [countable] BOsomeone who makes and repairs guns
Examples from the Corpus
gunsmith• Their victims include a woman who is withdrawing money from a cash dispenser, and a gunsmith.• That's been examined by a gunsmith who says the gun was real.• He was a gunsmith who turned to tailoring after the declining need for full-time gunmakers made the craft unprofitable.• Nothing around the twentieth, the gunsmith had repeated for each caller.• Among the artisans who contributed to Aarau's fame in medieval times were the gunsmiths, swordsmiths, cutlers and bell-founders.• The gunsmith would have murdered him or had a heart attack. 