This sound appears to be a simple stock-style effect rather than a quote or recognizable clip from a specific film, game or character. Short gun loading and firing sounds have been widely used for years in meme edits, shooter montages and dramatic reaction videos because they create instant tension and a clear payoff. Creators often choose this kind of audio when a plain shot is not enough and they want a brief build-up before the impact, much like other exaggerated effects such as Pew_Pew.