Incorrect. That was a standard Yugoslav manufactured M48 rifle modified, apparently by a Bosnian, after the collapse of Yugoslavia. It was not made that way during the course of Yugoslavia's existence and therefore not "official. Furthermore, if you'll refer to my comment above, you will see that the only "official" M48 snipers were scoped with a side mounted copy of the SovietPU style scope so it cannot be one of those later put to use.
My reference for my comment above is the book "Serbian & Yugoslav Mauser Rifles" by Branko Bogdanovic. Mr. Bogdanovic is Zastava's historian, a researcher with Belgrad's Military Museum and a former Yugoslav Army officer with service in the 1970s included training on and with M48 rifles.
I believe we may safely take Mr. Bogdanovic's word on that.