I heard from a friend of a friend that knows a guy....
That the Canadian Army will be going to Ruger Mini30 s (7.62x39). Apparently it has to do with the "new" piston craze and the ability to scrounge ammunition while in Afghanistan. Canada doesn't want it's soldiers to be the only ones without a piston rifle. Rumour has it the 7.62X39 mm is actually used as currency there, the same way we use pennies here.
It's part of the new Canadian Afghanistan financial initiative program. Even taking into account that they'll have to fire 200 percent more rounds to make the same hits, it's still considered more cost effective.
True story