the weapon Fajo used in TNG's third season "The Most Toys". It's vaporization sequence gets my vote as longest and most gruesome in any trek. Gave me tons of nightmares as a kid, but has also established Fajo as one of my favorite villains. It's illegal in the federation, and only 5 were ever produced (Fajo owns 4). Curiously, the Ferengi were frequently seen with similar weapons, as were the police on Rutia in "The High Ground".