Afraid you are wrong, that Garand is completely disabled and legal without a lock cable he same way a bolt gun is disabled by removal of bolt or removing a firing pin , the firearm is unusaeable!
I know, I added the fact that the bold is within a couple of feet, in the same room, hence the lock.
But back to the OP's question.. you couldn't even have a locked restricted receiver laying around anyways.
You would have to have one legally deactivated to have it as a showpiece without any locks/cables/etc.
As an example, I'm currently building an M1 garand, and the receiver is on my coffee table:
If I didn't have that lock cable in there, it would be an illegally stored non-restricted firearm.
EDIT: it's locked since I have the bolt in proximity/same room.
Also, the '80% forging' you speak of is prohibited, not restricted, since the RCMP deemed that you could finish it to an 'M-16' automatic fire capable receiver.
is that a house hippo?
If you meet more than one azzhole per day...chances are you're the azzhole....