Single shot glitch

I really love the game overall....!? But its unplayable to the max! LITERALLY..... EVERY GAME!? I have to deal with the single shot glitch when im in a fight. Especially up close battles. I start shooting, n then it only shoots one bullet. Its every **bleep** game!? Fix this ASAP. So new people who want convert to intense shooting n loving game. Like myself, that it can be playable.