1) The M14 isn't as awesome at close/midrange sweeping anymore (the laser is gone), but rather something for longrange combat (the SCAR's scope is added).
2) The SCAR is less about sniping (the scope is gone) and more about close/midrange sweeping and thick crowd cleansing (the M14's lasersight is added and it now pierces targets too)(EDIT: Note that the lasersight would have to be on 100% of the time, cuz it already has the toggle semi/auto on its secondary fire).
3) The AK is then the "average assault rifle" with no real special effect, but is the perfect average in terms of stats.
4) The Bullpup is then the "sniper assault rifle". Since it is somewhat weak (at least on HoE it is), it could get a slight boost in its headshot multiplier perhaps? From 1.1 to 1.25 or so?
EDIT:
Furthermore: Since the SCAR would now probably be considered much more powerful and useful (at its sweeping and crowdclearing role), how about increasing its weight to 7, while making the Bullpup only weigh 5?![]()
I'd prefer something other than a CQC AimPoint on the M14 BBR. Maybe a Leupold or a Trijicon, not an RDS.
All for the SCAR-H's iron sights, though that would necessitate having to redesign it with a rear iron sight attached, and the front sight in the "up" position. I suppose that's not too much work compared to remaking it entirely.
Perhaps you could try this idea too:
A C-mag instead of the normal magazine. Sadly that's a -L version but you get the idea.