Projectile weapons exist in the Star Wars universe, albeit they're called "Slugthrowers" the ones that fire actual bullets.
[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/NxEUT.jpg
The SW universe is not devoid of projectile weapons. they have..

 1. Mass drivers
 2. Grenade launchers
 3. missile launchers
 4. mortars