This research note documents and confirms the earliest known sculptural representation of a firearm-like bombard discovered in the Buddhist cave temples of Dazu (Ta-tsu), Sichuan. Initially identified by Robin Yates in 1985 within Cave No. 149 of the Beishan (Lung-kang) complex, the high-relief sculpture depicts a horned demon discharging a metal tube weapon, complete with visible muzzle blast and projectile. Due to initial uncertainty regarding its attribution and date, the authors conducted a follow-up investigation in 1986, supported by the General Catalogue of the Stone-Carvings of the Ta-tsu Cave-Temples (1985). Their findings confirm both the correct cave identification and the interpretation of the object as a bombard or handgun. Stylistic, contextual, and iconographic analysis places the sculpture no later than A.D. 1128, significantly predating previously accepted representations of firearms. Additional associated figures—some armed with traditional weapons and others holding explosive devices—further support the interpretation of an early gunpowder-based weapon system within a military-religious iconographic program. This discovery provides critical material evidence for the early development of gunpowder weaponry in Song-dynasty China and reinforces arguments presented in Science and Civilisation in China concerning the Chinese origins of firearms technology.