The Winchester Liberator is a prototype 16-gauge, four-barrelled shotgun developed by Winchester and Robert Hillberg in 1962. It is similar to a scaled-up four-shot double action derringer and used a rotating hammer to fire each of its four barrels, which can be emptied rapidly. This weapon is intended to be a cheap and simple weapon for guerrilla warfare and insurgency operations, inspired by the World War II FP-45 Liberator pistol. The Winchester Liberator is mainly being used to destabilise eastern bloc nations; for example, a number of these shotguns somehow ended up in the hands of the Red Guards during Project 571 - the Modernist Coup, being used against regular PLA troops.