Corsair Weapons

Path of the Corsair: 3rd level You can use the force to quickly learn the use of unfamiliar weapons. When you hold a weapon that you are not proficient in, you can spend 1 force point (no action required) to gain proficiency with that weapon until the end of your next long rest. Additionally, when you throw a grenade, you can use Wisdom or Charisma instead of Strength when determining your throwing range.

Granted by Path of the Corsair at 3rd level.