This is pretty much the industry standard HPA adjustable regulator.... http://www.ebay.ca/itm/181541288614?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AITIn addition, you will need fittings and hoses to connect to your tank and the gun, including a bleed valve on the output side, between the regulator and the gun....Bob