
I've seen this described as a 'rifle grenade', but upon using Google Translate on some Polish sites, do I understand correctly that this was in fact launched by a rifle (the kbkg wz. 1960, an AK variant intended only for launching grenades), but was used only in conjunction with artillery gun sights for training artillery gunners, as in pic below?

I have only seen practice versions of this design (if this was intended purpose there would only be practice ones), in both black paint and bare metal finish and not sure if this signifies any difference?
would be interested in any further info on other Polish rifle grens for AK too