Which regulation addresses the physical security of arms, ammunition, and explosives?

The regulation that addresses the physical security of arms, ammunition, and explosives is indeed AR 190-11. This Army Regulation specifically outlines the policies and procedures that govern the safeguarding of sensitive materials, such as weapons and munitions, to prevent theft, destruction, or unauthorized access.

In the context of military operations, the physical security of arms and explosives is critical for operational security and safety. This regulation ensures that facilities handling these materials are properly secured, and personnel are trained to understand the risks and responsibilities associated with managing them.

Other regulations listed do not focus specifically on the physical security of these items, which makes AR 190-11 the appropriate choice for this question. For example, AR 735-5 is primarily concerned with property accountability, while AR 600-38 deals with the management of Army programs for the health and fitness of military personnel. Meanwhile, AR 190-51 deals with security and management responsibilities of Army installations but does not focus specifically on arms, ammunition, and explosives. These distinctions help reinforce why AR 190-11 is the correct regulation for this topic.