Yep , its a gen 3 piston..V4s are better and take up to 500 shots to break with out the mods listed ,
..Add inline reg with an reliable sub-300psi output (I use AKA regs, but Joedirt had success using a stock internally adjustable wgp reg, so it doesn't need to be anything fancy, as long as it can handle 200-300psi)
-Remove the middle o-ring on your reg piston to disable your thumper's internal reg (jd used his internal reg for fine tuning, with the inline reg to keep the input from going over 300psi, and you might also want to try this if you're uncomfy disabling your internal reg, although it might become necessary later)
-Setup bottomline so you can use CA and run that to your reg
-Make sure you reg never goes above 300psi! more likely you'll set it around 250-270psi to get the right fps, but just make sure it doesn't get past 300psi or you'll damage the actuating valve
-Make sure to check all o-rings are still good
-Lube everything up (with light lube, not too much)
Air it up and go from there.
Last edited by Brewtt; 10-13-2012 at 02:18 PM.