VR Expansion Plugin

I’m very new to Unreal and game making in general so sorry if is very simple or straight forward to do but i feel lost and could use a little help. I’ve been looking over the Example Project and playing with the gun setup. what I’d like to do is what i hold the gun with the Motion controllers grip, i wanna pull the trigger to fire, not pull the grip again as I’ve changed the tags to drop the gun when grip is released, but now can’t fire. how do i go about making the gun fire when the trigger is pulled.
Again if is really simple i’m sorry, but I’ve been going over and trying many things without any luck. Thank you for all your hard work and any help you can provide.