Bottom line, if the barrels were made after 1898 you need a form 6.
You can import small parts with a wholesale value of less than $100 without a form 6. But all barrels, breaching mechanisms, and receivers require a form 6 regardless of dollar value.
If a US citizen follows the advice of gunsaholic re carrying a gun over the border and then selling the gun in Canada..... they are in violation of the US Arms export control act and can find them selves in a world of hurt facing years in jail and huge fines. This is a no BS law, the Feds can turn your life upside down and inside out.
