If its leaking through the barrel there is only one place it can be. The valve area there are there two orings, pin and seat and Delrin ring on the pin seat. The block is super unlikely. Unless some happened to cause a crack. The highest probability it the valve in your gun is the wrong size or worn. There are three different valves that fit this gun. What caliber is your gun? Does your gun have two power setting or three? If your gun is a regulated .25 the valve hole in your gun is a .216 its the largest seat. If I remember wright the valve pin head will measure .168 if your gun was refreshed some of the kits only came with one valve pin. The valve pin for the .22. If its the oring that holds the valve seat in. Ernest will some time's but a over sized oring on the SS valve seat before installing it. I've never found it needed. And that oring is super easy to clip. If replaced you may have clipped it. But I have found the Delrin to wear on the pin and or be the wrong size. If you can wait, on Sunday Ill be able to measure all the pin and valve sizes for you. If you dont know if your gun is regulated. If it has the fill will be on the tank and uses a fill probe or is has a external high pressure line from the fill behind the grip to in front of the tank. It will only to visible with the stock off. It's regulated. On the Royal/Bobcat there is a small hole for the regulator to equalize but its hard to identify with the Bobcat because of the triger assembly. Maybe I can help you figure out what size valve and pin you need and if your's is right or wrong. Mont
