TRIGGER GUN, MV925 4500PSI, 8GPM Pacific Bay Equipment Sale! from $30.20 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Economical easy pull trigger gun. PSI: 4500 GPM: 8 Temperature: 320°F 3/8" FPT Inlet x 1/4" FPT Outlet Weight: 16.08 oz.