WRT of your additions on Switzerland: it's much less universal now, post-Cold War. They only manufactured a bit over 600,000 SIG 550s/Stgw [19]90s for a current population of 8 million. Per Wikipedia the size of the official army is now "about 200,000 personnel, 120,000 receiving periodic military training and 80,000 reservists who have completed their total military training requirements." With a 15 year normal term of service, if they're still following the old pattern of allowing you to buy a converted to semi-auto version of your service rifle when you muster out, quite a few of those have been removed from service.