Rumors speak of metal devices that launches small bullets with great speed and loud rapport. Not especially accurate or reliable, skilled archers may still be able to put these to some use, if they do indeed exist.
Guns have no penalty in combat (like light crossbows), do not suffer the restring (or occasional failure) that crossbows do, and do more damage than light crossbows (but less than heavy crossbow). Guns can be used to longshot but do not scattershot. Bullets cannot be fletched and two mobs sells them and but only steel/piercing. There are no splinter bullets. There are a few mobs that carry faerie and exploding bullets (in very small quantities).