Sort of. The actual PE90 as sold in the rest of the world is a semi 550. The 550 is prohib because it was in the Gun World Book of Assault Rifles and it made a bureaucrat pee his panties just looking at the picture. The Swiss Arms rifles we get here are in fact 540 based rifles, and since the 540 preceeded the 550 they aren't a variant of the 550, and we can own them. Keep in mind that with these rifles the Upper is the gun, not the Lower - so if the Lower looks a lot like a 550, there could be a reason. I believe the props for getting SA to produce a 540 based semi-auto rifle for Canadian civvies goes to The Shooting Edge, who were the original importers.