Hey people I want to ask do I have to pump every time I will shot or? I mean If I put an air compressed bottle on the cord npt ball valve that goes in the P could I shoot more times or? Thx :D here is a link of a cord npt ball vale http://image.dhgate.com/0x0s/f2-albu-g2-M01-52-49-rBVaGlXhYCWAQ_KwAA...