The Astra 600 is a Spanish semi-automatic pistol that was used during World War II by the Wehrmacht.

Designed by Unceta y Cia, it was a shortened version of the Astra 400 manufactured to fire 9×19mm Parabellum, which was the standard pistol ammunition for Germany at the time.

In 1943 the German government requested Unceta y Cia redesign the Astra 400 to fire the 9×19mm Parabellum cartridge.

The colloquially known "second contract" pistols were the batch sold to West Germany and can be identified by having a serial number 31,350 and above.

[7] Pistols sold to the Portuguese Navy were marked with the abbreviation "MRP" on the upper left part of the slide.