Is there a particular advantage or special treatment of C&R aged suppressors? I know they died off en masse here after the passage of the NFA--as such was the intention-- but they didn't totally blink out of existence. I gather there were quite a few made during WWII and also lots in other countries because they have had no such artificially stunted relationship with them as we have here. There must be a few of them out there at very least. Is it easier to go about grabbing one of such with a C&R?