I'm a FAN of the long handguard like some US AK Handguards. Not a fan of taking away the use of OEM irons - but replacing the whole top MIGHT be attractive if I was a 3 gunner looking for a solution.
Anyone KNOW where they got that M4 adapter that is STRAIGHT and sits low? That might be very nice.
I will say that this is intriguing:
https://www.gundocthor.cz/vz58/cnc-celokryt-pro-vz58Adds 21 oz and costs $342.
I estimate it adds about 11 oz to the rifle given it replaces the hand guards and rear top cover. Spread out over the gun, that is not bad. You can then go with any variety of optics, sights, and easy to mount lights, etc.
Wonder who may import - but again the 58 industry here is minimal.