Well that sounds darned near impossible.Is it not firing at all? Have you checked to make sure the brass ring is in contact with the top of the carto? Are the batteries in snugly? Mine make a teensy little "snap" noise when they go in right. Has the o-ring under the carto come loose and gotten in the way? Is there juice around the connection? Have you tried the carto on something else to see if it works?
I have a working BB. I don't see the oring out of place. I tried taking the working tank, batteries and brass ring out of the working one and putting them in the new one and it's just dead, nothing.





