Does anyone know how to remove the barrel locking detent of a HW80 found on the front of the cylinder which the barrel locking latch rides against when you close the barrel. Need to remove it to refinish the air gun. Not sure what the correct name of this part is called, cant see the part on a parts diagram. Is this part spring loaded and is it held in by a pin-or screwed in. Thought they may have shown how to do this on complete HW80 strip down videos on Youtube.