I dont really know what shipping to the US is all about but you might want to enquire directly with the shops themselves, you can see a list here:
http://www.mydeactivatedguns.co.uk/shops.phpPersonally I think you have several issues, first is whether you have a firearms licence or whatever you have in the US. If so then you are in a different ballpark.
If you dont then at a guess you cant ship deactivated guns because the big metally bit needs to be savagly torched into 3 parts. You'll know more about that if your in the US. I sort of know this as I have looked into buying deactivated guns in the US and you cant. You just cant get them. Which is odd really considering the US is armed to the teeth with real guns. Everything needs to be torched open.
The last point is that you might find UK deact dealers might send you the item but you'll have a problem at your end for a wide range of reasons. For example, in the UK we can or from Zib in Germany and they will send stuff, but our retarded government who are part of the EU wont accept their EU deactivation certificates, so as soon as they arrive they are classed as proper firearms. The exact legislation is a bit more complex, but in the UK the onus of proof is then on the holder, not the certificates and after having called Whitehall and the deactivated people they are all certain that German Deactivated guns are all live firing and highly dangerous probably resulting in home invasions at 3.30am in the morning when your asleep cuddling your gun collection or something.
In short, they might order them, and they might arrive in the US but you might be in legal jeperdy of federal, state or border laws so you really want to take up a nice sport like blogging or or trainspotting, but before you start either of those you might want to check with DOHS that youe not being a terrorist.
Hope that helps.
My advice might be to email a few shops selling stuff you want, titling your emails - Shipping Firearms and Weapons From UK to USA etc so that it flags up on their email client and is clear what your enquiring about etc and doesnt flag up NORAD security alerts in Australia where all US/UK eaves dropping happens as spying on your own citizens in illegal.
