Here is my superbolt pump for sale. I have the full madman spring kit (have had no need for any other internal upgrades), custom products reg, on/off asa, and two piece barrel with .679 back. Operating pressure is between 250-300 when sweetspotted to achieve 280 fps. It has the ccm pump kit which gives it a super smooth pump stroke. I can't remember the brand feedneck but is aftermarket as well. The ccm kit cost me $150 alone, so the asking price of $300 shipped US is not unreasonable for a pump in great condition. I really don't want to let this go, but cash is in need right now.