Image Number 3 for United States Patent #6752042.
A tool designed to remove a primer cap from a muzzleloader, the cap popper comprises a pair of flat blades joined with a hinge. A first end of the cap popper is wedged between the gun nipple and the primer cap. The other ends of the cap popper blades are then squeezed together by the user, forcing the primer cap off the nipple. A built-in cap holder is supplied to hold fresh primer caps.