Hmm. I suppose it depends on if they use an Ar15 lower, or if they just drop semi guts into a full auto receiver. Other than that and the supressor I don't see why you shouldn't be able to import one. Try asking Prophet River or IRunGuns.
Hehe, 7.65x51 on full auto sounds fun, they could use a web editor. I would be interested to get a look at this delayed sear activation system of theirs, sadly FA is bad and evil and will touch me inappropriately.
Edit, actually is this an AR? It says it's for 7.62x51. I thought standard AR does not fit 7.62 in the magwell? Eh, probably considered a variant anyways.