This is a really good point. I greatly appreciate the feedback! When I was designing the game I wanted to make it so that the player can play with an old console box (since I tried to draw inspiration from old arcade games) that they have enough buttons to do so. Intuitively I was used to playing arcade games that had a joystick (which maps perfectly to WASD) and 4 buttons (which maps to Q, E, Left click, Right-click). My oversight is that I forgot most of these old arcade games do in fact have a button to pause (which I could map to ESC). This would allow the player to rotate their weapons forward and back because I could bind the other cycle button to Q and make pause be ESC and it would still work on an old console box.
More modern arcade games have more buttons though so this is a very valid point. Possibly I could map each secondary to a button.
I really appreciate (and agree with) the feedback!