High ROF auto rifles already have some of the best time to kills ( the reason they don't accually kill the fastest is because of stability) so and much more damage could end up being to much and making them too good.

Read my original post then please :) I suggest only making that amount noticeable in very close range, then having the buff become unnoticeable at range.

Limiting the range could work and I'm not saying it wouldn't. It's accually a fairly good idea. I just don't want them to have range problems to the degree that they would be beaten by shotguns and fusions( because they would be able to run up to you more easily that if you were using a longer range weapon).

While they do have the fastest kill times this is taking headshots into account which just simply is not what this kind of weapon was meant to do. Perhaps an exotic though =P Buffing the overall damage and nerfing the range on that weapon's archetype is definitely the way I see these weapons shining while retaining balance. Addressing what you were saying, I would also hope they could be on near equal terms of range with fusion rifles. Those are special weapons though so with that in mind I think we'd generally want fusions to still feel like a special weapon to.

It would have to have ok/bad rage and a very steep damage fall off, like that of a shotgun