I have some experience with RS Regulate products:
I have a VZ304M lower mount on my Czechpoint CSA Vz 58 with a T1 microdot mount and a primary arms red dot.
I have an AK301M lower mount with a T1 micro mount with a Holosun 503GU on my WBP Fox AKM.
I have a GAR10M-N 10 inch m lok rail handguard for my IWI Galil ACE 5.56 carbine.
In my opinion, the RS Regulate mounting system for side rails is the best optic mounting solution for Vz58s and AKs along with handguards for the Galil ACE are the best that money can buy.
They are considered by some to be overly expensive, but you definitely get what you pay for. The designs are innovative, strong, ergonomic, and lightweight. The machining is superb.
I'm even considering getting one of their new AK GKR-10M handguards for my WBP in the future.
I would love it if they would produce a Vz 58 m-lok handguard, but I doubt that there is enough of a demand right now.