I don't happen to agree. The SCW is a PDW intended for the short-range engagements associated with close protection operations. Just because .300 BLK subsonic loads are optimized for short-range use with a silencer doesn't mean that the calibre's supersonic loads aren't at least as capable as 7.62x39 mm out to 300 metres. The .300 BLK is optimized for 9" barrel length, whereas the 5.56 mm is hobbled in a pistol-length barrel with a commensurate reduction in that round's effective range. 9mm is severely limited from the outset and is largely irrelevant beyond 100 metres. For these reasons I believe that the .300 BLK in a supersonic load is the optimal calibre for the SCW's anticipated employment.
The SCW's Canadian legal status as a Restricted "Range Toy" is completely irrelevant to the discussion of firearms capability... ������