Any idea on what stats to use for Bossk's gun?

From what I gather on starwarswikia, its a blaster rifle with a micro grenade launcher.

Any thoughts?

Dangerous Covenants has stats for a grenade launcher. Snag a Blaster Rifle of your choice, attach this Grenade Launcher, and let person using it decide which part of the weapon they're going to fire. Maybe require a maneuver to switch between modes or something and reduce the damage of the grenades a bit since they're "micro" grenades.

Although looking at Wookieepedia, it calls it more of a "mortar gun" or something that shoots "high impact bolts" rather than a grenade launcher.

After further thought, maybe just a blaster rifle with the under-barrel grenade launcher, 5 ammo, forearm grip and weapon sling. I suppose there is no need to complicate it with its own individual identity.

pretty much what tim said. even though i like the idea of it being a grenade-launcher with an under-barrel blaster rifle

Back when it was just the core book that would have been fine, but the line is getting fat with gear so it's only a matter of time before everything has its own entry on the gear lists.

True. It will probably show up in the Bounty Hunter book.