A wrist mounted crossbow made for quick use. It's small compactness allows it to be wielded while still being able to use your hands
The Brace attached to the crossbow holds 10 bolts. as a bonus action you can reload the crossbow with one of the bolts from the Brace.
if you roll a Nat 20 with the Attack roll the crossbow immediately reloads another bolt and fires it as well.
Proficiency with a hand crossbow allows you to add your proficiency bonus to the attack roll for any attack you make with it.
Notes: Ammunition, Light, Loading, Range
Proficiency with a Hand Crossbow allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Vex. If you hit a creature with this weapon and deal damage to the creature, you have Advantage on your next attack roll against that creature before the end of your next turn.
Notes: Ammunition, Light, Loading, Range, Vex
i think you forgot to add range, the bonus against AC and damage die