Originally Posted by White_knight
so let me get this straight. i could just drive down to the US, buy lets say a tm M4, pop the plastic lower off and then proceed to bring the rest of the gun over?
When I've done it, I've ditched both the upper and lower. I've also provided a bill of sale, along with the seller's contact info in case they disputed the value of the goods. I declared them as air rifle parts made in Japan, and I took a hit of, I think, 16% on duty (I bought other stuff while I was there that put me over my duty-free limit).
As I said before, I don't guarantee this will work for anyone/everyone. It works for me. Your experience may be different based on the agent you talk to, the way you act, what you're wearing; hell, it might be affected by the fact the agent broke up with his girlfrind the night before and is still pissed about it.
All I can say is that honesty is the best policy, and it works for me. I make no gaurantees for anyone else.