China’s gun-free society is maintained through a paradox—while the state’s disciplinary apparatus unmakes any exceptions to the norm by continuously disarming the wayward, it simultaneously perpetuates exaggerated narratives of threats posed by clandestine gun makers in the ethnic frontier regions. This article investigates the state’s construction of Hualong, in Northwest China’s Qinghai, as ‘the capital of China’s ghost guns’. By debunking the quasi-historical claim that Hualong was a major firearms manufacturing hub in the early twentieth century, the article reveals how the modern Chinese state uses this narrative to reinforce an ethnopolitical reset—placing the Han in exclusive control of both firearms’ regulation and the sovereign right to punish violators. Drawing on multiple archival sources, the article argues that monoethnic control of arms was a central tenet of twentieth-century ethnic nationalism. Furthermore, this article demonstrates that early twentieth-century Qinghai was adept in taking advantage of the mobility and fluidity of arms afforded by a trans-imperial infrastructure in its state-making enterprise. That infrastructure included Western missionary networks, treaty ports and foreign concessions inherited from the late Qing, a revitalized maritime hajj route, Japanese imperialism, as well as an expansionist Chinese nationalism struggling to find a foothold in the former empire’s legacy frontiers.