I think I understand the proplem for our US contributors: they probably do not want to come out and say that other peoples do not have the right to decide their own gun laws, since this is so obviously unreasonable, but they worry that the arguments used by other peoples to reach the conclusion that stringent gun controls are a good thing might be applied to the US too, and be used by the government to undermine or limit their current rights to carry arms. So not being content to defend their own gun laws they feel the need to criticise other people's laws as well.
At the extreme, to safeguard the 2nd Amendment from the dreaded "wedge" argument, the rights of all other nations in the world to manage their own affairs according to their own traditions, culture and laws has to be, if not denied outright, denigrated, held up to ridicule and contempt, and condemned as a slippery slope on the road to totalitarian enslavement.
So I would really appreciate it if any of the US contributors would step up to the plate, play the game, man up, stop evading the issue, and state whether or not they believe that the people of the UK, via the mechanism of their own constitution and law, have the self-evident right to limit the right to keep and bear arms.
Come on, you know you want to...