I wouldn't be too surprised if a half-ton Spartan could shoot an S2AM from the hip. The real tricky question is whether they can hit anything past 300m.

: And they should all have this guy.

Meh. I'd prefer a voiceover by David Attenburough, personally.
*Camera pans over a Vietnamese rice paddy where, thirty years later, somebody dug up old Vietcong supplies.*
"And here we see the AK-47 in its natural habitat."