I have a Shocker that is totally custom. The base shocker starts off with a electronic board that allows it to shoot 11.25 balls a second. This gun is a 2001 ,upgraded motherboard so you can hook up your hopper to it of you buy the cable from SMARTPARTS.com . The board in it has turbo which means you can make so that if you pull the trigger more than 2 times a second it will bring the shots fired per second up to just under 10 balls per second. Or keep it on semi using the Angel grip frame and go up to 11.25 a second. The reason a Angel grip frame is on it is because it is easy to hit the max rate of fire. The gun will come with a 88 ci MAXFLOW nitro system. 18 inch custom barrel from J & J performance[looks like the one on the gun in pic]. Plus I have a viewloader 12 volt hopper to go along. Go here if you want to see the internals and how the Angel grip frame was mounted.http://pbnation.com/showthread.php?s=&threadid=38109 $600 takes it. A little more for insurance which I do advise.