Projectile weapons exist in the Star Wars universe, albeit they're called "[Slugthrowers](https://starwars.fandom.com/wiki/Slugthrower/Legends)" the ones that fire actual bullets.

[![A Slugthrower being used to defend the city Iziz][1]][1]

The SW universe is not devoid of projectile weapons. They have...

 1. Mass drivers
 2. Grenade launchers
 3. Missile launchers
 4. Mortars

  [1]: https://i.sstatic.net/NxEUT.jpg