I wasn't comparing a smokestack to a smoking gun, but the Master Piece analogy wasn't the best (forgot all about them selling them over here). I'll try again...
The Gen 1 reissue Primes from Hasbro has short stacks for safety reasons. My Collection Convoy has long - God-intended - smokestacks. As they are both the same TOY they should both confirm to the same Australian Standard, regardless of how it's marketed in Japan.
Given that, has anyone considered the potential ramifications of importing and owning something which could be illegal?
(This isn't just a shortstack question - which may not be recognised as a hazard by Australian Standards - collectively we import a lot of stuff and it's something I'm curious about.