The interlock ransomware group listed National Defense Corp on its data leak site on 2025-03-29. Country: US Sector: Government & Defense Domains named: nationaldefensecorp.com Claim as published on the leak site: AMTEC is a manufacturer of lethal and non-lethal ammunition, explosives, and cartridges for military and law enforcement use. Globally, AMTEC is the largest volume producer of 40mm Grenade Ammunition and Fuzing. Their capabilities include precision assembly, explosive load, assemble and pack, metal forming and plating, and primary explosive manufacturing. The company is headquartered in Janesville, Wisconsin.