No, not one bit.
If that was their real intent, they could have written it in the law, similar to what they did for rifles. The fact that they (general assembly) did one and not the other is not to be disregarded.
More importantly, just because the MSP says they won't enforce it, does not mean it is not a crime.
Quite the opposite...
It was never the legislature's intent to grandfather handguns purchased before 10/1 but picked up after 9/30. See the following thread which references a failed amendment: http://www.mdshooters.com/showthread.php?t=123920.