gunslinger

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++gun·sling·er /ˈɡʌnˌslɪŋə $ -ər/ noun [countable] American English informal  SHOOTsomeone who is very skilful at using guns, especially a criminal 熟练的枪手〔尤指罪犯〕

Examples from the Corpus

gunslinger• He was an information officer, not a gunslinger versed in controlling the tension of a shoot-out.• First he began to shy away from the crowd of young street thug arsonist gunslingers.• A peerless champion of his own era, he had been reduced to an ineffectual has-been by the modern gunslingers.• It wanted to go from being seen as a bunch of gunslingers to a more professional business approach.• Where were the saloons and the gunslingers and the professional card sharks?• Creed, the gunslinger, had been faster, though.

gun·sling·er nounChineseSyllable  

someone who guns, very is using at Corpus especially skilful

gunslinger
gun‧sling‧er /ˈɡʌnˌslɪŋə $ -ər/ noun [countable] American English informal
someone who is very skilful at using guns, especially a criminal

gun·sling·erBrE /ˈɡʌnslɪŋə(r)/ 🔊NAmE /ˈɡʌnslɪŋər/ 🔊 noun (NAmE) a person who is paid to kill people, especially in films/movies about the American Wild West （尤指美国西部电影中受人雇用的）杀手