The civilian version was designed not to take full auto parts. The requirements to do so are even more stringent in the USA then they are in Canada.
In Canada, one may own a 'restricted' weapon, upon registering it and having a plethora of certificates and licenses and completed courses and waited for ever.
That said, the Canadian weapon may have a short barrel and a collapsible stock. They have no concept of SBR.
I remember Alan Rock banning every rifle that looked mean or was black. I remember the days when Canada had easier gun laws than USA. Those were the good ol' days until liberal dushe bag Kretin and his poncho A. Rock f**ked it up.
So - the RCMP may sit on that forever. It's up top them - since they were given that authority by Orders in Council C68.
Unlike the AR15 variants, there are NO FULL AUTO parts available to the civilians in the USA, never will be.
One would need a full auto lower and a full auto bolt carrier - none of which are going to reach the populace - unless a police department decides to de-militarize them - in which case - parts kits may become available. That's the only way someone in Canada 'may' have the necessary parts to convert a semi-auto SCAR to full auto.
Quite frankly - the Canadian owners can just as well get the full auto parts kits for their AR's and be done with it. Much faster, simpler and easier. The AR15 is now a restricted weapon, same as the SCAR would be.
So in as far as the RCMP - they are just stonewalling the issue. They have much in common with the ATF, except more incompetent and beligerant.
-TH