Just add a new collision volume (box, sphere, etc.) component to the actor, adjust the collision settings to your liking and choose which one to use on different conditions 
You can use the Component Overlap Actors and On Component Hit nodes to detect such events for specific components!
Oh the title led me to think that your objective was something else. You can also use the Set Collision Response to Channel or Set Collision Response to All Channels nodes to achieve your goal!
Hope these help 