I don’t know the import laws very well. I do know machineguns have to be torch cut. The body of Peregrinvs Mk4 would classified as a machinegun receiver here and it would have to be torch cut per BATFE criteria. Barrels also have to be destroyed. Semi-auto rifles and shotguns can be imported, but there are some additional restrictions, like the Obama ban on guns from Russia. Maybe Brian can answer the question better?