30 cal marauder I built with a drop block regulated cf 4500 psi bottle lw barrel in a aluminum shroud grouped under a inch at 50 yards single shot tray is all I have wasn't able to get a mag for it it's Cothran valve and uses the air tube for a plenum I think I have regulator set around 1900 has a small leak I believe it is at the bottom plug hole on the drop block when I shot it last it was at 80 ftlbs with jsb 44 gr pellets Cothran valve is the .250 transfer port valve and I can't remember if I ported tp and barrel to .200 or .250 I would take $ 500.00 shipped if you think I'm out of line shoot me a offer pm me or email me [email protected] 
