The three laws which Freedom1Man refuses to acknowledge are 18 USC 922 (a)(3), (a)(5) and (b)(3).
http://www.law.cornell.edu/uscode/text/18/922
In summary:
18 USC 922 (a)(3) makes it a violation of Federal law for an unlicensed person (license meaning FFL) to transport into or receive in their state of residence any firearm that that they purchased or otherwise obtained outside their state of residence, with the exception of firearms that are inherited and rifles and shotguns obtained from an FFL in accordance with (b)(3).
18 USC 922 (a)(5) makes it a violation of Federal law for an unlicensed person (license meaning FFL) to transfer, sell, trade, give, transport, or deliver any firearm to any unlicensed person who does not reside in the same state, with the exception of firearms that are inherited and firearms that are loaned for sporting purposes.
18 USC 922 (b)(3) makes it a violation of Federal law for an FFL to transfer any firearm other than a rifle or shotgun to any unlicensed person who does not reside in the same state the FFL has their business located. However, (b)(3) does allow an FFL to transfer a rifle or shotgun to a resident of any state so long as the laws of both the state the FFL is located in and the state the unlicensed person is from are followed. A non-Washington FFL still has to comply with Washington laws for the transfer to not violate Federal law.
All language regarding contiguous (bordering) states was removed from Federal law in 1986 and the provisions for FFLs to transfer rifles and shotguns now apply to residents of any state - they do not have to border each other.
It's up to you whether or not you choose to obey the law, now you have the facts.