It's simple, the revvy has a paddle inside it that turns when the neck detects that there isn't a paintball in it.Originally posted by Ally^McK
See if ur playing rec ball with a Revvy or something along those lines, doesnt it crush up the paintballs in side the marker? I dont understand how they work, can someone plz xplain or give me a link so that i can find out how it works... plz it would be a great help.