They never did answer my emails in a timely fashion, or at all for that matter. First time I emailed them it took two weeks for a reply, then the second time I emailed them they never replied.
I eventually bought mine through josko at double tap sports and I waited about a month, maybe a month and a half for it to arrive. But finally, straight from czech, I got my OKO sight, steel shield, and upper handguard mount in a nice little box.
The upper handguard is really not necessary and you could make one yourself. THe mount literally bolts to the handguard using three screws and is slightly shaved off on the top of the wood to make for a flat surface for the sight.
Its pretty sturdy and I doubt would lose zero at 50 yard ranges.