Guns 1 and 3 are your only keepers. I personally think Gun 1 is better for PvP as it has extra stability without sacrificing anything. Plus it has bonus damage and the chance to restore health after getting a kill. Gun 3 is good but you would have to land headshots like crazy for Triple Tap to be worth it. The perk almost never plays a factors in PvP and is much more suited to PvE. Sure Third Eye is great, but not necessary. And it has no extra stability. Personally Gun 3 is better for PvE and Gun 1 for PvP...but that's just how I would play it. Either one could be effective in either situation. So definitely keep those 2. Gotta admit I'm kind of jealous.