- Jul 30, 2008
I know from practical experience it is much easier to jerk the spear free of the piston than just pulling it out with a steady pull, especially with metal pistons. To do this after testing the gun on land by working the piston up and down in the barrel without latching all you need to do is push the spear tip into soft ground and stand on the opened out flopper. A sudden upward pull on the tank and the spear disengages easily. If a piece of wood is used with a hole drilled through it then you can stand on the piece of wood instead.