One of the big problems is that as far as I know , the only "approved" semi-auto MG34 in the FRT is one built using the TNW receiver and patented bolt conversion.
Also, the receiver is exceedingly difficult to machine and "rewelds" are not useable since in Canada, once a machine gun, always a machine gun - no matter how many times it was torch cut. (unlike in the USA).
I am not aware of any source for bare TNW receivers and bolt parts, so...
Possibly Questar could get the receivers in, but then there would still be no parts kits around.
Or, just buy a complete gun from Marstar like I did.