@JeremyECrawford can an artificer: gunsmith benefit from another classes extra attack? Attacking twice before reloading?
— Brent Hanchey (@hanchey_brent) February 18, 2017
Thunder Cannon says it must be reloaded as a bonus action after you fire it. You therefore can't attack twice before reloading it. #DnD https://t.co/EI69NS3uI0
— Jeremy Crawford (@JeremyECrawford) February 22, 2017