That would absolutely break PvP.

really? Why because it would add 2 or 3 shots to the golden gun?

Its a one shot kill in PvP, 5-6 golden gun shots would allow you to wipe out an entire team VERY easily.

And so is all the other special abilities. Every other special ability is a one shot kill as well. The difference you are trying to point out is that THIS special ability enables the devastation to be spread out over a slightly wider area. I don't think it would "break" PVP to allow the Hunter's golden gun ability 2 or 3 more shots. That is just making it possible for them to do what i can do on my hunter and titan currently which is to kill more than 3 with my special ability. Ask yourself though...what are the chances that all 6 players on the opposing team are going to all be in the same area of the map at the same time? If they were....this would actually be a pretty stupid tactic due to the fact that they all can be wiped out so easily with or without the golden gun buff we are discussing.

On maps like Rusted Lands, Twilight Gap, and Firebase Delphi, killing 4-6 members of the enemy team would be a very real possibility with your proposed buff. The only other super with the same level of maneuverability is Arc Blade, and that at least requires getting close to your target. Wiping out the entire enemy team with FoH or Radiance almost never happens, hell killing 3 people with either of those supers is a rare occurrence in itself. No other super can match the PvP flexibility of GG. Its in PvE that GG lacks luster.