In 2013, the National Guard reported a suicide rate that was substantially higher than both the general population and the active duty component of the United States military. The prototypical National Guard suicide decedent appears to be a young male firearm owner not currently deployed who dies using his own gun. Prior research within the military has revealed that soldiers are unlikely to seek out or engage in mental health services. In sum, current best practices in suicide risk assessment are poorly equipped to identify the individuals most likely to die by suicide. This study aims to examine the acceptability, feasibility, and utility of a single lethal means counseling session as part of a suicide prevention approach targeting demographic groups overrepresented in National Guard firearm suicides. 232 firearm-owning male National Guard personnel will be randomized to one of four conditions, each of which requires a single 15-25 minute session: (1) lethal means counseling (2) lethal means counseling plus the provision of free gun locks (3) health and stress control condition (4) health and stress control condition plus the provision of free gun locks. We anticipate that those who receive lethal means counseling will subsequently store their personal firearms more safely and report being more willing to store their firearms away from the home during any hypothetical future suicidal crisis. The overarching goal of each hypothesis is to examine the extent to which gun owning young male National Guard personnel at varying levels of suicide risk are willing to engage in means safety.