"Guns on Campus: The Architecture and Momentum of State Policy Action" offers a detailed summary of state legislative action and higher education system policy decisions that have occurred in two specific categories: (1) States that have permitted or are seeking to permit guns on campus; and (2) States that have prohibited or are seeking to prohibit guns on campus. Report sections highlight general themes for enacted bills and provides detailed examples of state legislative activity. The theme analysis of the policy areas concludes with considerations designed to inform policymakers and campus leaders as they consider policy action and move toward the implementation of laws, rules, and regulations governing firearms on postsecondary campuses. The following are appended: (1) Guns on Campus Policies: State Legislation; (2) Guns on Campus Policies: System Policies; (3) Guns on Campus Policies: Court Cases; and (4) Guns on Campus Policies: Legislation Introduced in 2015.