Thread: Importing a firearm part without an import permit

I was chatting with a shooting buddy yesterday, and he mentioned bringing a new gun stock back from an upcoming shooting trip without obtaining an import permit before hand.
He seemed to have the idea that he would just declare it, and leave it with customs and then apply for a permit if needed.
I know once in the past this may have worked, but under the rule changes what are his chances this is going to happen?
I'm thinking fairly remote,
I've tried to find relevant info on line but without success,