This heading covers weapons designed specifically for military use — artillery, mortars, rocket launchers, and similar crew-served systems — and explicitly excludes revolvers, pistols, and edged arms. Sporting shotguns, rifles, and handguns designed for civilian use fall under separate headings. The military-design intent and the weapon's operational role are the primary classification criteria.

Imports of military weapons are subject to State Department International Traffic in Arms Regulations (ITAR) and typically require an import license or authorization. Most lawful imports occur through licensed defense contractors or government channels. Importers should engage legal counsel experienced in ITAR compliance before attempting to import any article under this heading.