I installed it
That rifle is a vz 2008, other brands might vary.
Modifications to the rifle- remove lower hanguard, handguard retainer, and sling loop.
Modifications to handguard- the four mounting screws must be replaced with longer screws. Buy 4 10-24, 1 1/2" long button head machine screws at the hardware store. Also from the hardware store, you will need 4 aluminum unthreaded spacers, 1/2 inch long, with an inside diameter to fit the 10-24 screws. I paid $4.60 for all these parts.
When you mount the handguard, the spacers go on the screws between the heat shield and the barrel clamp.
Depending upon your choice of upper handguard, you might have some interference. I had to grind a very little bit out of the lower handguard right at the front of the upper handguard, and an even smaller amount out of the upper handguard where it was hitting the rear barrel clamp.
I have seen some other vz-58 rifles that fit the handguard much higher. It would take a lot more cutting and trimming, but it is possible. In that case, no spacers, use the factory screws, and I think you would need a lower profile upper handguard, like one of the small cowitness railed handguards.
Here is another one where the handguard sits higher (not mine)
