I'll start off with a couple Pathe videos:
IFVs offered for the Czech Army.
CV90 turret armament options:
Main armament options:
120 mm tank gun
35 mm Bushmaster III (capable of using 50 mm Supershot, but it's a smaller catridge than the Rheinmetall one)
30 mm Bushmaster II (capable of using 40 mm Super40 ammo)
Left sponson options:
Storage box
7.62 mm MG
12.7 mm HMG
40 mm AGL
HEW (future option, IMO rather unlikely due to the high power consumpt