If I understand correctly you want to use one sound to play randomly. That’s when you add in a “random” node. Such as this as an example…
And what you could do like it shows is add a delay and at different times. And what happens is that the random node will randomly select (obviously) which sound to play after the delay time. But I would advise to duplicate the gun loop. I’m not sure if doing it the way it shows will work, I didn’t test it. I just put it together so you could see what to use. I hope this is what you needed and helps.