CIA World Factbook offers detailed information on each country. Select the country of your choosing, and then browse categories ranging from people and society to government to economy.
Or, sort by category of information including military, military and security forces, military security and personnel strengths, and military expenditures.
The Nuclear Threat Initiative (NTI) profiles include an overview of each country's nuclear, chemical, biological, and missile programs, in-depth information on participation in relevant nonproliferation treaties and regimes, compilations of countries' official documents relating to nonproliferation, and links to related content.
The United Nations Office on Drugs and Crime offers a variety of data sets available to you, including firearms trafficking. Data is available for review and download, including:
You can view and sort through country lists, here.
"United States Country Profile: Number of Arms Seizures by Type of Weapon, 2022"