You've got to see it to believe how powerful these mini cannons are. Due to the extremely precise bore (+/-.0005") they are able to harness all the energy in the black powder (or cap gun caps) much better than the competition. The cannons are CNC machined from 304 Stainless Steel for much better corrosion resistance than brass with machined anodized aluminum bases. Your choice of anodized colors and either stainless steel or brass hardware. The perfect gift for the person that has everything!