The Welrod and Welwand are fascinating objects of a bygone era of espionage. Invented specifically for the British Special Operations Executive, they were purely weapons of assassination for use inside Fortress Europe or against Imperial Japanese Military officers. So effective and reliable were these weapons that the Welrod is reported to have been in active service until very recently behind the closed doors history of the British Special Air Service.
The Welrod was created in two calibers, 9x19mm Parabellum, and .32 ACP. The rationale for .32 ACP was that it could easily accept ammunition from various sources on the continent due to the popularity of the cartridge there. However, this was later changed to 9x19mm as a more powerful round was needed for the device. The Welwand, or Sleeve Gun as it was nicknamed saw much less service but was no doubt an effective assassination tool in use by SOE and numerous resistance organizations, specifically the Danish resistance as we have some recorded usage by them in the book “SOE The Scientific Secrets”.