Long-barreled Musket

Dropped by 3

• Firemane Ash Tail level 43 0.1% 4331
• Galak Windchaser level 25 0.1% 4096
• Bilgerat Corsair level 31 0.1% 62329

Dropped by, from a shared table 40+

• Acidic Swamp Ooze level 41 4393
• Azurescale Manaweaver level 41 60910
• Bar'thog the Wicked level 42 61020
• Bloodsail Mage level 41 1562
• Borrin Gloombeard level 41 60908
• Drathos Runebreaker level 44 60911
• Dustbelcher Mauler level 42 2717
• Dustbelcher Shaman level 43 2718
• Dustbelcher Wyrmhunter level 41 2716
• Firemane Scalebane level 44 4328
• Firemane Scout level 42 4329
• Foulhide Overseer level 43 61362
• Foulhide Shaman level 42 61392
• Gan'zulah level 41 1061
• Ghostly Raider level 41 11686
• Gordunni Ogre level 41 5229
• Greater Vilewing Bat level 45 61401
• Lakeshire Guard level 55 10037
• Lord Aliden Perenolde level 41 2423
• Lord Angler level 44 14236
• Maraudine Priest level 42 11685
• Menethil Sentry level 42 1434
• Mire Lord level 42 1081
• Muckshell Pincer level 42 4403
• Muckshell Scrabbler level 43 4404
• Muckshell Snapclaw level 41 4402
• Mug'thol level 43 2257
• Night Watch Guard level 55 10038
• Shadowforge Geologist level 41 7030
• Shadowforge Skinner level 42 60903
• Snarlclaw level 47 61405
• Stonevault Shaman level 41 2894
• Tangled Horror level 41 766
• Targ level 41 2420
• Thromrar Darkflame level 44 62725
• Venture Co. Strip Miner level 41 674
• Venture Co. Tinkerer level 41 677
• Wastewander Thief level 41 5616
• Witherbark Scalper level 41 2649
• Woodpaw Mongrel level 41 5249

Only the first 40 are listed.

Found in 17

• Weapon Crate 6.7% 3704
• Armor Crate 1.9% 3703
• Alliance Chest 1.5% 105581
• Solid Chest 1.5% 2857
• Solid Chest 1.3% 4149
• Large Iron Bound Chest 1% 75297
• Large Iron Bound Chest 1% 75296
• Large Solid Chest 1% 75299
• Large Solid Chest 1% 75300
• Alliance Chest 0.9% 4096
• Alliance Strongbox 0.9% 4095
• Solid Chest 0.9% 2852
• Alliance Chest 0.7% 105579
• Alliance Strongbox 0.7% 105570
• Horde Chest 0.7% 105578
• Solid Chest 0.7% 2855
• Large Solid Chest 0.4% 153462