Glow on the Physgun!

The one who made this physgun added a glow effect. I made a edit to this but i can’t seem to get the glow working. My question is: How can I add the glow? or… Are there any tutorials I can look at?

Sorry I’m kind of a noobie

Check your graphics. If your running on a shit computer (such as I) you dont see the glow.

Or there may be and error in the lua

Save it with the alpha layer next time.