Just thought i would post up about traveling to the US as i do it so often and some things have been missed.
firstly remember in some US states inc Mass (Boston) and Hawaii paintball markers are considerd firearms, but regardless of state laws you MUST contact the airline in advance. Its not a problem and tbh its more for your kits safety. You need to fill in a firearms declaration form and get yoru luggae tagged - now this is useful as by being Tagged the luggae handlers dont touch it, a nice security guy will come take your bag and lock it in the fire arms hold and when you land be it Stateside or UK you go to customs to pick it up.
Now UK side they are fine and never check what it is, sometimes when you arrive stateside they will require a look, now for this get some picks of tourney ball with your luggage before you pull out the marker.
Before packing - take out th ebolt and battery, leave the battery side grip open as they normally wanna check this. Also remove batterys from hoppers - mine have a habbit of turning on in flight and its a waste of weight too.
So theres my top few tips
If you have an air bottle, take off the reg chuck it in your luggae and dont mention it, but also note unless your bottle is DOT or Tri tested you cant use it in the states - there air fills are far tighter than ours.
Also note the reason to tell them, all bags are now scanned, anything remotly reasembling a firearm will get pulled and you can get royally screwed if you have not declared it, in fact a mate was sent home over it and lost his right for a visa waiver which is a big pain in the arse. so risk it at your own loss.
Any questions raise them here or PM