Kinetic weapons have been around since the beginning...
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Lets not forget catapults and trebuchets.
Expecting a celebratory BOOM! from Q soon!
yup, that was the 1st link after Newtons law about the Chinese using them since the 4th century and Europeans in the middle ages.
Arrows.
More recently, mag-rails.
Rock throwing is the application of a semi-sophisticated kinetic weapon.
Add a stick to that thrown rock so you could throw it better, and call it a javelin. And a more sophisticated kinetic weapon.
Add more power by adding another stick with a cord, call it an arrow, and even more sophistication in your kinetic weapon. . .
Take your rock and put it in a barrel like device and put an explosion behind it and you’ve really got a much more sophisticated kinetic weapon.
Take away? Guns are just more efficient rock throwing kinetic weapons!