Ice Threaded Bullet

Ice Threaded Bullet was ammo for guns.

Source
These could be bought for the price of per 200 from:
 * Gaelden Hammersmith in Alterac Valley
 * Grunnda Wolfheart in Alterac Valley
 * Thanthaldis Snowgleam in Alterac Mountains
 * Jekyll Flandring in Alterac Mountains

You had to have have reputation with the  Stormpike Guard or  Frostwolf Clan to purchase this ammo.