For years I am puzzled about the gun that is using the French 25x193 (rimless) variant of the well known 25x193R AT cartridge.
One would think it was for an automatic weapon but I never saw anything that would explain which gun it was used with or how it looked.
The first thought is about the well known 25x163 AA gun with a longer receiver but I never saw anything like that on images (as the magazine would also be longer then and should be recognizable).
A Spanish document referrs to this cartridge as “for AT machine guns”. (EDIT: just found this detail, so we are definately speaking of an automatic weapon)
One source mentions thih cartridge to have been made for Mexico and the Japanese have captured these in 1939 in presumably China.
Also we know these cartridges to having been captured by the Wehrmacht in France.
Anybody to ID the gun? Are images available?
Here some images from the web: