(a) A bronze medieval-style wall or rampart gun was found at this Coronado expedition site in southern Arizona. It is 42 in (106.7 cm) long and weighs about 40 lb. The diameter of the bore is .95 in ...

A bronze cannon recently recovered by researchers in Arizona appears to be the oldest known firearm ever found in the continental United States. According to experts, analysis indicates the 40 lbs ...