From WoWWiki

Ammo Pouches are a type of Ammo bag, They function similar to quivers; the only difference is that they hold a gun user's ammo (shot or bullets).

Currently available ammo pouches:

Quiver	Level	Slots	Price	ROF	Source
[Small Ammo Pouch]	-	6	6	10%	Hunter Starting Gear
[Small Shot Pouch]	-	8	1	10%	Vendor
[Small Leather Ammo Pouch]	-	8	Crafted	10%	Leatherworking (30)
[Medium Shot Pouch]	10	10	10	10%	Vendor
[Hunting Ammo Sack]	(15)	10	Quest	10%	15 Vyrin's Revenge, Loch Modan
[Bandolier of the Night Watch]	(18)	12	Quest	11%	18 The Night Watch, Duskwood
[Heavy Leather Ammo Pouch]	30	14	Crafted	12%	Leatherworking (150)
[Thick Leather Ammo Pouch]	40	16	Crafted	13%	Leatherworking (225)
[Ribbly's Bandolier]	50	16	Drop	14%	Ribbly Screwspigot, Blackrock Depths
[Gnoll Skin Bandolier]	55	16	2250 / 10	15%	Alterac Valley Vendors
[Smuggler's Ammo Pouch]	68	18	10	15%	Honored: The Consortium
[Knothide Ammo Pouch]	60	20	Crafted	15%	Leatherworking (325)
[Netherscale Ammo Pouch]	70	24	Crafted	15%	Leatherworking (350), Revered:Honor Hold/Thrallmar

Equipment and Weapons
Armor	Cloth • Leather • Mail • Plate  –  Cloak • Necklace • Ring • Trinket • Shield
Armor sets	Druid • Hunter • Mage • Paladin • Priest • Rogue • Shaman • Warlock • Warrior
Melee weapons	Axe • Dagger • Fist • Mace • Polearm • Staff · Sword One-handed • Two-handed • Main hand • Off hand • Dual wield
Ranged weapons	Bow • Crossbow • Gun • Thrown • Wand  –  Arrow (Quiver) • Bullet (Ammo Pouch)
Relics	Idol • Libram • Totem • Spellstone/Firestone