Quote Originally Posted by blacksmithden View Post
No, you can't bring a gun back from the US. The problem isn't on this side of the border...its the US side. In order to bring a firearm, firearm part, or firearm accessory out of the US, you would have to make an application through ITAR. In order to do that, you would have to be in the US when the application is made, and as far as I know, be there though out the processing time, until they sent back approval.
If you are planning on keeping your American Citizenship this may not apply to you because you would just be technically bringing them in for the duration of your stay. Like Canadians taking firearms south of the border when they go on holidays. Best to ask The American authorities on this one.