Hi Vlademeir and welcome. The swivels are removable so you can change to a picatinny rail fairly easily. Cheers, stay safe and enjoy!

Hi Vlademeir, yes sir, the rear trunnion is pre-drilled to accommodate a variety of accessories, so the swivel can be removed to add a rail. See pictures here >>> https://zastavaarmsusa.com/product/zpap92/
The pic rail you need is here >>> https://zastavaarmsusa.com/product/3-piece-1913-rail-adaptor/
Stay safe & have a great day!