MegaXL Sidearm?

Hey all, I'm looking to my next build or buy/mod. I'd like either a pistol or short shotgun that can shoot MegaXL with as much spice as possible before the darts start fishtailing. I'm thinking maybe Foxbat with a Silly Spigot, or maybe a Thumper, but I'm not super stoked on the harmonica clip. Anyone out there rocking a MegaXL sidearm, or have a plan for one? TIA!