(Oh, and the balloon WILL go up one day. Take that to the bank my Canadian friends.)
5.56mm
I have no doubt. And I thank you in advance. And I think of the US more as the oldest, strongest, most willful and most independent brother of Canada. Canada is a little brother, the baby of the Anglosphere family. It cheerfully does whatever is easy, taking the path of least resistance and trying to be liked by everyone. And for the most part, it succeeds, but at the very high cost of its own development.
And for the record, the Canadian military is world renowned for its search and rescue. Its one of the few strong points. The others being snipers (some of the native/Indian Canadian snipers in particula are incredible. That's what comes of your grandfather teaching you how to use a rifle and hunt from age six on), counter-terrorism (believe it or not, JTF 2 is world class. Just very, very small. Its numbers are secret, but I'm led to believe they're about 150 strong at present) and anti-mine.
As for the rest...Well, we abolished tanks. We, as I said in my article, have a critical shortage of pilots, our equipment is dangerously obsolete, and in short supply, and our troops as well.