In about 4 weeks, it will be academic, but a MAK-90 could be pre-1994 ban. If it were in a pre-ban configuration, with no more than 10 specific imported parts (to conform to 1989 import ban), prior to the ban's effective date, it would be considered pre-ban, well for a little while longer anyway.
As GunNut said, a US fire control group and stock set should get to to, or under, the 10 imported parts count. And I'll agree that Kvar makes some nice furniture.
Speaking of which, GunNut, how much fitting was required to install the Kvar furniture on your Mak?