Scout and Fusion Rifle. I honestly think having two primaries is one of the stupidest ideas Bungie has come up with to try and fix their abomination of an excuse for balance. They had a chance to fix their three weapon system with a clean slate and could have rebalanced both shotguns by taking away their 1HKO damage and sniper rifles by taking away their overly aggressive aim assist but instead they made both heavy weapons and potentially screwed up the entire PvE weapon dynamic that D1 had so finely created.