Shocktech traditional style bottomline (not the on/off), coupled with the most popular Drop Forward, the Drop #1. Now packaged together with the grip frame mounting screws and 2 - 1/8" N.P.T Pipe Plugs. The bottomline is tapped for 3 gas exit holes, so you can find the hose configuration most comfortable for your shooting position. Then plug the other two holes or screw in a gauge if you like. The Drop #1 pulls the bottomline up nice and tight to allow your tank to get into your bunker with you! Light, Tight and Cheap! What a deal, Hook yourself up anytime you like!