There's a million threads like this, but is Accurized Ballistics, Shot Package and Rifled Barrel a roll you'd run with in PvP?
It's on my Titan if you want to suss it out.
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I'd use Aggressive ballistics over Accurized. Agg ballistics, shot package, and rifled barrel are what I have one my PC +1 and it does very well. My last perk is Final round, but I rarely get down to that last round.