Rheinmetall AG is a holding company, which engages in the production of automotive components and defence equipment. It operates through two segments: Defence and Automotive. The Defence segment offers vehicle, infantry equipment, protection and weapon systems, air defense systems, function sequence networking as well as simulation hardware and software. The Automotive segment supplies engine blocks, plain bearings, and pistons. The company was founded by Heinrich Ehrhardt on April 13, 1889 and is headquartered in DÃ¼sseldorf, Germany.