The most powerful crossbow as of 2014 is the Scorpid Velocity, which features a speed rating of 425 feet per second, kinetic energy of up to 180 pounds per foot and a draw weight of 165 pounds. The Scorpid Velocity weighs 8.5 pounds, and its overall length is 37.5 inches.
Crossbows were used as far back as the fifth century B.C. in both Europe and China, and up until modern times, were commonly used for warfare, assassinations and hunting. Today, crossbows are mainly used for leisure, hunting and science; however, there are still some military applications, such as establishing grappling hooks and zip lines, probing for and detonating tripwire initiated mines, and tactical situations where silence is important.