NSG needs to do something about safety. That mpx is on its full auto mode.
I had a similar thought for a moment when I saw these pictures initially but then I saw the rehearsal pictures where NSG had safety tips on the end of the barrels and safety inserts into the chambers, this is a step above the safety standards I've seen from any other force (I'm sure most do this with their small arms for the armoury)
so I'm not entirely sold that NSG operators just forget basic weapon safety, this is not a joke, every single individual that participates in this parade is hand selected, vetted and knows the significance of the event and their leadership keeps a close eye on every detail- I cannot imagine they would let their top guys representing their units embarrass the unit by extension by making such rookie errors.
So, and
@Gessler probably knows more about this than I do but from what I understand the MPX has a similar trigger assembly to the M4/AR15 which cannot be put on safety with the hammer down (it has to be cocked first).
There is a term known as "rack safe" that is used for storage:
^0.50
Hence the MPXs as they are used for parade purposes only here and so have empty chambers and are "uncocked" aren't in safe.
The MP5s have a different trigger/cocking mechanism so are always seen in safe with NSG