I've never paid much attention to those, but when i saw that sling deals 1d10-2 I damaga, with primitive (5) I realised something is reaally wrong. That means that sling deals on avarage 2,9 damage. That's not enough to harm a fit human which has TB of 3. I'm not even mentioning armour. Thats stupid. Sling were used for a long time as a lethal weapon in ancient armies. And here you have to stand in front of someone for half an hour, and throw a stone (or metal balls) after stone at him to kill him. I know it can be used to throw grenades, but still.
Hand bow - same thing, primitive (5). It cannot be used even as a silent assasination weapon, because darts are too weak to deal even one dmg required for toxin to kick in.
Bow - primitive (6) - useless piece of junk. You'll need a full quiver and a lot of luck to kill someone. I would give it around 1d10+1, primitive (8)
Finally bolas - why it has primitive (1) quality if it doesnt deal any damage?