This video explains how to make an airsoft gun out of a revolver style cap gun, i.e. rather than merely making a loud pop the toy gun will shoot plastic airsoft BBs as well. Begin by drilling a hole through the barrel of the gun as the shaft of a cap gun is solid. Take eight plastic BBs and fill each of the revolving cylinder compartments, pack the BBs lightly with a small tool. Finally, reassemble the revolving cylinder and the gun and place the cap ring into the cylinder as you would normally. Make sure you are outside and safe before testing your converted cap gun.