Jetcaster

Jetcaster consists of one watertight central
ammunition bladder & several air bladders linked
by specialized nozzles. Wielder compresses the air bladders (a standard action that doesn’t provoke attacks of opportunity), the Jetcaster sprays its ammunition in a 10-foot cone. Loading
ammunition bladder is full-round action that
provokes attacks of opportunity. Refilling the
bladders is a move action that doesn’t provoke attacks of opportunity.