Oiled Blunderbuss

Dropped by 4

• Mongress level 50 0.1% 14344
• Galak Windchaser level 25 0.1% 4096
• Skullsplitter Warrior level 40 0.1% 667
• Bilgerat Corsair level 31 0.1% 62329

Dropped by, from a shared table 40+

• Acidic Swamp Ooze level 41 4393
• Angerclaw Bear level 48 8956
• Angerclaw Grizzly level 52 8957
• Angerclaw Mauler level 50 8958
• Bar'thog the Wicked level 42 61020
• Bloodsail Mage level 41 1562
• Borrin Gloombeard level 41 60908
• Diseased Black Bear level 52 1815
• Diseased Grizzly level 56 1816
• Dustbelcher Wyrmhunter level 41 2716
• Elder Shardtooth level 58 7445
• Firemane Scout level 42 4329
• Ghostly Raider level 41 11686
• Gordunni Ogre level 41 5229
• Grizzled Ironfur Bear level 45 5272
• Icepoint Whiteclaw level 46 60545
• Ironfur Bear level 42 5268
• Ironfur Patriarch level 49 5274
• Lakeshire Guard level 55 10037
• Maraudine Priest level 42 11685
• Muckshell Pincer level 42 4403
• Muckshell Snapclaw level 41 4402
• Night Watch Guard level 55 10038
• Nightpelt Cub level 50 62822
• Old Grizzlegut level 43 5352
• Rabid Shardtooth level 60 7446
• Sandfury Ritualist level 46 62500
• Sandfury Shadowhunter level 46 7246
• Shadowforge Skinner level 42 60903
• Shardtooth Bear level 54 7444
• Shardtooth Mauler level 56 7443
• Stonevault Shaman level 41 2894
• Tangled Horror level 41 766
• Targ level 41 2420
• Thromrar Darkflame level 44 62725
• Ursius level 56 10806
• Venture Co. Strip Miner level 41 674
• Voidwalker Minion level 47 8996
• Wastewander Thief level 41 5616
• Woodpaw Mongrel level 41 5249

Only the first 40 are listed.

Found in 20

• Weapon Crate 6.7% 3704
• Weapon Crate 5% 3689
• Large Iron Bound Chest 1.2% 75295
• Large Iron Bound Chest 1.2% 74447
• Large Solid Chest 1.2% 74448
• Large Solid Chest 1.2% 75298
• 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
• Alliance Chest 0.6% 111095
• Battered Chest 0.6% 2849
• Large Solid Chest 0% 153462