The issue is... you are dealing with the US Federal Government.. and the US Federal Government doesnt exactly talk to itself very well, very clearly, or nearly often enough... and you are potentially dealing with multiple agencies within the US Federal Government...
First consider that the ATF is very clear that it regards a "suppressor" as a "firearm"...
https://www.atf.gov/file/55371/download#:~:text=The NFA defines the term,section 921 of the GCA.
Then consider that US Customs and Immigration is very clear on THEIR expectations and requirements for you "exporting" a firearm (3 or less firearms - get the 4457 filled out, etc..etc..)...
https://www.ice.gov/investigations/astp/faq
and THEN consider that Customs also tells you that taking ANY firearm outside of the US is an "export"... (see same link above under the FAQ section)...
and THEN consider that Customs also tells you that SOME firearms are DDTC (State Department) regulated for export and that you MUST comply with all DDTC regulations (also see same link above).. that ALL permanent exports are controlled by DDTC.. and most temporary exports are controlled by BIS (Dept of Commerce) (same link above)..
Then consider that both the USML (controlled by DDTC) and the BIS license export list (controlled by BIS) have both been in a constant state of revision and change for more than 10 years (started during the Obama administration and still has not reached completion)..
https://www.wilmerhale.com/en/insig...in-export-control-regulation-september-2-2010
Do you really want to be reliant on some TSA agent or Customs Agent actually knowing what the law/requirements/regulatory environment is TODAY upon trying to exit or enter the country.. when a much easier solution is simply to pay $200 to purchase a suppressor in South Africa?
Just because someone else has made the trip easily doesnt mean you will.. nor does it even mean its actually legal...
I just perused both the Silencer Central and Silencer Shop websites.. I couldnt find anything on either site that says its as easy as getting a 4457... in fact they provide a lot more information and speak to the many potential problems..
Silencer Central provides A LOT of helpful information.. but they are clear.. YOU do the due diligence.. YOU know the law both in the US and in the country you are traveling to.. it is not necessarily an easy process..
In previous blog posts, we’ve covered what it’s like to travel domestically with a suppressor and internationally with guns and ammo, but we haven’t covered international travel with a suppressor. That changes
www.silencercentral.com
Its been stated several times in this thread (and others) that YES.. in most cases you can in fact take a suppressor outside of the US... BUT.. there are potential pitfalls and trip hazards along the way.. and depending on what device you are actually talking about, and where you are specifically going, and where you are initiating your flight from, and where you may have connections.. things have the potential to get complicated and/or expensive along the way...
you can certainly take your chances.. maybe youre right and absolutely nothing happens... or.. maybe youre right, but some dolt of a TSA or Customs agent doesnt think so and you end up getting delayed 2 hours while they figure things out and you miss your flight.. or.. maybe youre wrong and the TSA/Customs guys doesnt know it and nothing happens... or... maybe youre wrong.. and the TSA guy is right.. and you find yourself being told you cannot board... or maybe youre wrong and the customs guy is right and you find yourself in deep excrement upon your return....
Is all of that worth it when you could have just spent $200 on a suppressor in country (pretty immaterial expense when considering the total cost of your typical safari)..
I routinely export "regulated" stuff all over the globe, to include firearms, very large quantities of ammunition, controlled communications systems, among many other things and have done that for the better part of the last 20 years... I have written the export compliance manuals for 3 different US government contracting agencies... I used to work as a direct report for one of the guys that wrote the gold standard for export compliance in the US (i.e. the Nunn Wolfowitz Report
https://lweb.cfa.harvard.edu/spp/ec/ecdocs/nunnwolfowitz.pdf ).... I like to think I know at least a tiny bit about this sort of thing... but... at the end of the day, any advice I offer is worth what youve paid for it (nothing)... just consider that others (for example.. the companies that hired me to build their compliance programs and compliance manuals) have paid tens of thousands of dollars for similar advice..
All I'm saying is... if you want to go down the rabbit hole of having to take your personal suppressor out of the country.. by all means.. go for it.. but dont think its actually as simple as getting it added to your 4457 and youre good (not if you actually want to abide by the law in many situations/scenarios)..
For me... I'd rather just pay the $200 and use the suppressor I bought in South Africa.. and then leave it there for the next time I return...