People would think the AN-94 was modeled wrong, the mag actually has a 30 degree tilt on the real one.
It threw me off quite a bit when I saw that at first. To me, it's part of what makes it a unique weapon... a bit.
I have never seen the 2 round burst modeled correctly in any game that has it. It actually fires the 2 rounds at 2000rpm, not a normal burst, which is why it has the pulley recoil system and looks so weird in the first place.
I think MGS4 had it pretty well done. Never could manage to get a double hit on the same spot 100m away with it, though. And... wasn't it 1800RPM? Splitting hairs at that point though...
To give you an idea, a MAC 10 fires at 1100rpm. If you had it on 2 round burst, it would fire so fast, that it would be like one shot, in the game, so it would basically feel like a 15 round mag, hard to balance, since in effect, it would seem as fast as semi, but do double damage.
But it does give a much better way of avoiding the M16 suggestions.
As for balance with the power, I was thinking that it would do fine with having it only set to 2-shot burst with that GL as the secondary fire. The shots doing about 24 dmg might work nicely, so it's like doing 48 (yes, higher than the AK, but hear me out). However, having a max ammo capacity of 420 would act more like it was 210 shots.
Do a little math, though, and you find that this would work as 10,080 dmg total (no HS), whereas the AK can do 13,500 dmg total (no HS). Then figuring with the Bullpup, that one does 13,000 dmg total (no HS) and the Mk 17 does 19,500 dmg total (no HS). All these with no bonuses.
As for the GL, having it do a little less damage would be almost enough balance as is. I don't quite think a reload speed reduction would be really... realistic. I don't know much about the GP-30 though, but isn't it just front load a grenade and then pull trigger?