This editorial argues that firearm injury is a public health issue squarely within the professional and ethical mandate of physicians, and that advocacy for gun control is a legitimate extension of preventive medicine. Responding to attempts by gun lobby groups to intimidate Canadian physicians, the author contends that clinicians’ direct experience with injury and death uniquely qualifies them to engage in evidence-based policy debates. The piece concludes that silencing physicians undermines public health, and that physician advocacy for gun control is both justified and necessary to reduce preventable morbidity and mortality.