A "class 3" neighbor told me it's impossible to take them out of the country. It's the ATF that will be the problem, not other counrty's regs. Suppressors are treated like screw drivers in most of the civilized world.
Case in point: In '14 I shared a camp in Namibia with 2 guys from U.K. who each had moderators (that's what they call 'em) on their .308s. They said there was zero paper work in owning them in Britain or in traveling with them internationally.
