Alright, marc. So are you attaching the skeletal mesh gun to your characters’ blueprint or is your character picking up the gun at a later time or something? If it’s already attached it’s extremely easy to play the montage off of it. You just drag it from the component list into the graph, drag off that reference node and type “Play Montage” like in the image I posted.
If you’re attaching it to the player later then whenever you actually interact with the gun or attach it you should create a variable of the gun’s object so you can reference it instead of a component.
If this is over your head you might want to take a look at this video by the Unreal team themselves: Blueprint Communications | Live Training | Unreal Engine - YouTube I realize it’s very long but it really breaks down how to communicate between blueprints using references, etc. And it’s a great way to get started in Unreal.
Good luck!