It just so happens that I have a set of those express sights here..
BUT they're still screwed down to my 375 and not available..
IMO this is a great rifle and you're going to be happy with what you've got. I do have QD pivots and a Leupold 1.5X5 on mine.

IIRC EAA picked up the Zastava line after Remmy dropped it so you possible might find replacement sights there or at Numrich.

Edit; Jeff's Outfitters has a set of QD pivot mounts for $99 that appear to be good. I just installed them on another Interarms rifle but I haven't shot it yet to see if it'll return to zero as they should.