in this vein:
If yourre proficient in daggers and crossbows, could you utilize something like a crossbow bolt AS a dagger (1d4 piercing) in melee?
Its technically a part of a weapon youre proficient in, used like one youre also proficient in…
— BC Jesse (@Ghost_Hack) September 9, 2018
— Jeremy Crawford (@JeremyECrawford) October 3, 2018