When I applied to bring my Nork SKS down to the states on a Form 6 it was rejected due to the US 1994 ban on Norinco non-sporting firearms. How do you manage to get yours down there?
As for the full-auto trigger group, this about sums it up
The only way that could be done is for an idiot to take out the disconector, leaving the gun to slam fire the magazine (good way to lose a face). None of the few Norinco SKS looking rifles (the Type 68 I believe) made it to North America.
As for the full-auto trigger group, this about sums it up

johnson said:Nah, im special.
I go to the states sometimes. Pin inserted for Canada, pin yanked for some parts of USA. Simple. Full auto trigger group too to go with the standard.
Ever seen an SKS put 450 rounds downrange in under a minute?
Good times.