yeah, i bought my 2 guns from the states to save cash, the 'pnumatic painting equipment' arrived just fine.
tips on getting a US supplier to fill in the customs form 'correctly'
make sure they value the item at less than £100 to avoid some taxes,
make sure they do not put GUN or paintball anywhere on the form.
things that have worked for me before have been 'paint marker' 'painting equipment' 'pnumatic painting equipment'
also if you have friends over here working for the US(gov / mil), you can have stuff shipped to their APO boxes, its then classed as internal US shipping so u save a ton of cash and they dont have any clearing problems on arrival.