Pat
As usual, it's the middle of the night
Two things I need.
(1)Are these the "rivets" you spoke of ? ( Red arrow )
If yes that does not looks like it might be anything but add on spaced or NK composite armour. At least those ones have the look of something real and not sheet metal Potemkin tanks as in the previous links of them driving on parade.
Especially in that location where "mud guard" might be a better description
(2) How did Kim Boy Dumpling ( Blue arrow )
actually get through the drivers hatch?