Deckard, your pics are like that:
first 2 are metric older models.
last 2 are proto/sample models
and they look different than the new M4 (imperial)
that I've played with.
There were none of that model (like in your last 2 pics)
in SA at the best of my knowledge.
The new M4 chinese clones look a little different at the carry handle IIRC.
I don't know how many 203's in Czech and Pole armies,
but after trials Czech imported a bunch of Romanian 40mm's
(slightly different design) and last year they ordered more.
In Canada, it's a pain to import anything in 40,
let alone GL's today make the list of some new international restrictions.