I'd say drop it for Chaperone or Lord of Wolves, but for buckshot: - Rifled Barrel is the best barrel, based on my testing, the bonus from full choke isn't [i] consistently[/i] super noticable, I also think pellet spread is slightly tighter at higher range stats. You want either Assault Mag for the fire rate bump or Accurized Rounds for the range bump. Perks... I'm not 100% sure what DRB specifically rolls with, but I know Swashbuckler is really good, handling bumps are always appreciated, as well. Masterwork Range because, no duh, Range is the most important stat on literally every gun other than snipers.