Here’s What You Need to Know: A handful of Gyrojet weapons saw combat in Southeast Asia with the U.S. military’s secretive Studies and Observation Group. In the 1960s an American engineer and his ...

Key point: A lack of ammunition has made this collector’s item difficult to shoot today. In the 1960s an American engineer and his partner invented a gun that fired rocket-propelled ammunition. Yes, ...

In "The World's Worst Weapons," Martin Dougherty details the long history of overambitious, underachieving weapons that failed to hit their mark. From brass-knuckle-knife-revolvers to rocket-propelled ...