I would guess other countries do not have the same level of deactivation as we do.
They do not and this was a problem at one stage. People would import deactivated weapons from other countries, where all they'd done was remove the firing pin and a couple of other easily replaced (and even legal to purchase in the UK) parts. This lack of understanding of the differences in standards led to the media splashing misinformation about reactivated weapons.
If it's been deactivated to current UK standard, it's pretty much a solid lump of metal.
I'm being stupid here but why deactivate weapons instead of melt them down?
In many cases, it's a piece of history.
The Lee Enfield .303 for example, almost a century of use that saw the UK through two world wars and still the choice for some shooters today. It's an absolute legend, alongside the Mauser 98K, .30cal M1 (Garand), the Mosin-Nagant used by Vasily Zaytsev, etc...
Things like the Brown Bess and Baker Rifle can still be shot with the right licences (black powder and shotgun/smoothbore), although the latter might require the rifling to be ground smooth
Weapons of obsolete calibre don't even need to be deactivated, although people do occasionally try to fashion round to fit... I understand that generally goes quite badly during test-firings, though!
But for the most part, deactivation skirts the RIF laws (because it's not an imitation) and the licence laws (because it cannot be fired). Even if you just intend to point it at someone sduring a robbery or something, the cost of the things means it's usually cheaper to get a plastic cap gun and paint it black.
I hope there were no wooden Staff's in there, heard they are deadly.
'Experts' on the matter suggest that was just an over-romanticised misunderstanding....