Animating a gunshot? (running animations at the same time)

I have looked through the AnimMontage documentation, as well as other documents that have been linked for me. I’ve watched videos, but they are all based on characters that need different animations occurring one after another. All I need is for three animations to play at the same time when the gun is fired and I cannot find information on how to do that to save my life. Can someone please help me? I must be missing something because it cannot be this hard to do this.