How to use Lasers and Beams pack?

I bought the Lasers and Beams pack from the Marketplace. Can someone give me step by step instructions on how to use this? I’m new to UE4. I probably need to add a particle system to the gun, but then what do I do?

Have you tried contacting the seller? There should be a support email address on his store page on the marketplace. =)

Yes, I emailed them, but they haven’t responded.