I dont think anyone has mentioned tactical airsoft and milsim magazine yet... Its out of the U.S., I have a subscription, and I find it an excellent publication. I was e-mailing Steve Kerry a while back regarding an irregularity in my subscription, and he went out of his way to personally rectify it for me. I learned that they're revamping the publication, and he said to wait before purchasing my next subscription, as they expect it to be cheaper in the coming few months.
And yes ShortCut, you can get N.A.M. magazine across the border. I bought an issue quite a while back, and received it no problem.
Hope that was helpful