Volley gun
Two notable artillery-sized volley guns were developed in the mid-19th century, although neither was particularly successful in practice. Developed in the 1860s and based on an 1850s design by a captain Fafschamps, the French mitrailleuse is an example of a multi-barreled volley gun that could fire all of its barrels simultaneously or sequentially over a short period of time. Also developed in the 1860s, General Origen Vandenburgh of the New York State Militia designed a weapon that had eighty five parallel .50 caliber rifle barrels. After failing to sell the weapon to the United Kingdom, he reportedly sold a small number to the Confederate States of America, although there is no record that they were actually used. One Vandenburgh gun was located at Fort Fisher, North Carolina, and another reportedly at Salisbury, NC.
Wax bullet
During the early 20th century, there was some interest in mock dueling with pistols loaded with wax bullets. The sport first gained popularity in France, and heavy canvas clothing was worn to protect the body, a metal helmet with a thick glass plate protected the head and face, and the pistols were often equipped with guards on the front of the trigger guard that extended outwards to protect the shooter's hand. For a brief time it was popular. It was featured as an associate (non-medal) event during the 1908 Summer Olympics in London.