What a genuinely awful build. I’ll stick to the NEA handguard/Barf stock/FAB grip/Magwedge peep sight I’ve used for years.
If I didn’t have better guns like my G36K, maybe a BCT quad rail and AR stock instead, similar to what we see used in the sandbox, but ehhhh. The optics annoyances kill it for me.
Leave it alone. The Vz is outdated, but a perfectly comfy and shootable fighting rifle as-is.