netbrad... PUs were made into 44 so it's incorrect saying wrong year.
As for the rest, for Izhevsk they numbered the barrel on the left side right above the wood line with the scope serial. It it's real, there would be a number that corresponds with the scope number. As for the scope, more pictures of the adjusting turrets will help us tell. Rounded screw heads point to real, flush screw heads are repro. Also, any photos of markings.
Always remember, with any milsurp, especially with snipers, always take as many pictures and as many angles as possible to assess whether real or fake or correct parts, etc.