Certainly if you use a big enough gun.

With a pistol or normal gun, probably nothing will happen.

With an anti material rifle you might get some luck if you are close enough.

Or you just take a tank cannon or artillery, those should have plenty of muzzle blast.

It is a indipendant state/country, with a ruling king, enforced borders, its own passports and even a standing army.

Iven if he can't get true diplomatic immunity, I don't think Argentina would trouble a foreign monarch over a 500 peso fine, even if he came back into the country.

In Switzerland it works like that too.

"Normal time" for us is 24h with colon so 18:00

While "Military time" is without colon, so 1800 and is then pronounced as achtzehnhundert (eighteen hundred).