I'm probably "still" on the wrong track... but the only other image I know of a Mudokon and a gun is this one...
Which is just Abe being whacked in the head with a gun.
This one is official, it is from Oddworld.com under the Abe section. Actually I don't even know of any "official" images of Mudokons holding guns, and my Oddworld image collection exceeds 1000 images.
Abe Babe...