This is our high efficiency valve for many of the KRAL Puncher Series. This valve has the gauge port on the bottom to fit the Puncher MEGA stock gauge hole. By
doing nothing other than installing this valve and using the factory
hammer spring, and hammer spring adjustment, we can dial a shot string
up to well over 900fps, and/or it can nearly double the shot count per air
charge. This is probably the best single modification for KRAL. These valves require very little force to open, and the best initial setup is to back the tension way off the hammer spring. It's possible (though we've never
actually done it), that firing the valve with a heavy hammer, and a
heavy hammer spring, with no pressure in the tank, could cause damage to
the valve internals. This valve does not fit the Puncher Jumbo, or the Puncher BigMAX.