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usually the u.s wont send if you need a permit. mine didn't attract gst either, under the max limit. I didn't ask, I just ordered it.
I guess its up to you, if you want to try. mine was from...

I got the 10/22 mag just the other day, including a filled rear bag. no questions, and the freight was $50, which I thought was a bit steep, but the bag was filled.
so if its a cat I doubt anyone...