Last time I was in a battle team, the C9 was meant to deal out suppressive fire. But, hey, we're all on the same team!
Well, to be honest, at 500m, I wouldn't be expecting troops to lay down lethal fire. It would be pray and spray. 7.62, OR 5.56. Especially in low light conditions.
I'd be on the horn calling for some counter battery fire if there were enemy mortars at that range, or something with wings or a rotor on it. Last ditch effort (not including movement) would be to put accurate rifle fire on a mortar position at 500m unless I was in a prepared position where I had ranges all figured out and such..
Designated marksman would be handy in this scenario.
But I hear what you're saying as to the lethality of a .22 at 500m![]()