The Danuvia 39M/43M was a Hungarian submachine gun designed by Pál Király in the late 1930s and used during World War II.

The guns were issued to Hungarian army troops in 1939 and remained in service throughout World War II and until the early 1950s.

Inspired by the SIG MKMS,[4] the Danuvia used the more powerful 9×25mm Mauser round, and incorporated lever-delayed blowback in order to better manage this high energy cartridge.

[3] The gun was well-liked by troops it was issued to; it reportedly functioned well in the sub-zero, muddy conditions on the Eastern Front.

It had a ramp-type rear sight above the ejection port and a post foresight at end of the barrel.