Chinese Bronze Crossbow Trigger Mechanisms

Timeline

1. c. -400–-350Borderlands of Han, Zhao, and Wei · Central PlainsBronze crossbow mechanisms cast the nut, trigger, and sight components in bronze molds; once engaged, the mechanism could store and release force, more durable than earlier bamboo and wood crossbows, and began to be deployed at scale in infantry and city defense across the states.
2. c. -300–-221Xianyang military workshops · GuanzhongState and Qin military systems modularized and made interchangeable crossbow mechanism components, inscribing workshop and supervisor information, forming a standardized war-machine production model allowing batch repair and replacement.
3. c. -221–-200Territory of the Qin Empire · ChinaThe Qin incorporated crossbow mechanisms into a unified armament system; actual specimens unearthed from the terracotta warrior pits show multiple models in use, with standardized bronze crossbow mechanisms becoming standard equipment for the empire's infantry ranged strikes.