I heard they were/are wielded on. Something about having a threaded barrel was an issue exporting them.
Never tried to take mine off, just used bore bright and a quetip.
But your GSG is just a handgun, not an evil "assault weapon" looking piece of plastic that seems to terrify the poor popo. They need special stupid rules for them made up to protect the population.In a previous thread, it was mentioned that if there is a crush washer, then the muzzle break is threaded on, if there isn't a crush washer then it is permeatly attached. Mine has the crush washer.
On a side note, I don't understand how the threaded barrel would affect the export. Lots a guns in Canada have a threaded barrel. My gsg 1911 has one.



























