The Saiga is a current production sport rifle while the SKS is military surplus, out of production since the '50s. About the only thing they have in common are the action (semi auto) and the caliber.
The Saiga is in fact marketed as a hunting rifle.
What makes this curious is that the law chose to toss in the term 'SKS' in their court documents.
If it's a Saiga then it's not an SKS. Can't be both.
So if I install an SKS in an aftermarket stock and add different sights its no longer an SKS?
Rhetorical question of course.
SKS is a model, a type defined by the mechanics of the action. No matter who builds it its still an SKS.
The US Rifle caliber .30 M1 was built by Springfield Armory, Winchester, Harrington & Richardson, and International Harvester.
The only thing they had in common were the action and caliber.
You're splitting semantic hairs with your claim the Saiga SKS is not an SKS.