Fifth wheel hitch

My 02 Dodge Dually Cummins just got a 18k patriot B&W. I just wanted to mention that not all understand what a "puck" system is or a turn over ball. In my case, I installed a rail system in the bed. I could have gone further with the hitch mod and spend way more but this is what will work for me. So as to clarify what this all means, can someone with the know how explain it so any newbie to 5th wheel gets it? I'm also new to this type of towing...Now comes the buggy... Toy hauler!