persian artillery rig

[sheepherder]

I am familiar with the reasoning of 'stretching' the 9 x 19 chamber out to 9 x 21 (to get around some Euro restrictions on military caliber ammunition) but I am puzzled as to why the Israelis should be involved in the development of this cartridge...

Does anyone know why Israel Military Industries got involved with this caliber cartridge??? It seems to me that it would take up valuable manufacturing time/facilities that could be better used to make more useful ammunition for the Israelis' own defense...

I've read the Wiki on the 9 x 21 but it doesn't tell the whole story...