Sentinel Musket

Dropped by 2

• Negolash level 52 1% 1494
• Gordok Ogre-Mage level 53 0.1% 11443

Dropped by, from a shared table 40+

• Barkskin Den Watcher level 62 61346
• Barkskin Ursa level 62 61342
• Barkskin Windtalker level 62 61347
• Disrupted Arcane Elemental level 63 61949
• Dreadlord level 62 8716
• Elder Growlheart level 62 61348
• Emeraldon Boughguard level 62 12474
• Felguard Elite level 61 8717
• Flamewaker Elite level 62 11664
• Flesh Hunter level 62 15335
• Grand Inquisitor Isillien level 63 1840
• High Protector Lorik level 61 1846
• Ima'ghaol, Herald of Desolation level 63 62606
• Infernal Destroyer level 63 62017
• Infinite Rift-Lord level 62 65105
• Jademir Boughguard level 62 5320
• Korrak the Bloodrager level 62 12159
• Lord Xanvarak level 63 61609
• Minion of Weavil level 61 15591
• Molten Destroyer level 63 11659
• Molten Giant level 62 11658
• Nathanos Blightcaller level 62 11878
• Onyxian Warder level 62 12129
• Rage Talon Captain level 62 10371
• Rage Talon Dragon Guard level 61 10366
• Relentless Felguard level 62 61351
• Sanctum Dreamer level 62 60742
• Sanctum Supressor level 63 61212
• Sanctum Wyrm level 63 60744
• Scalebane Royal Guard level 62 1050
• Shadowbane Alpha level 63 61191
• Speaker Gan'hota level 63 61361
• Spectral Worker level 62 61934
• Stone Guardian level 61 6560
• Verdantine Boughguard level 62 12477
• Warbringer Overseer level 63 62019
• Warlord Hanzento level 63 61360
• Winterax Berserker level 62 10984
• Withermaw Shaman level 62 62871
• Wyrmkin Firebrand level 62 1049

Only the first 40 are listed.

Found in 10

• Solid Chest 1.7% 153451
• Alliance Chest 1.5% 105581
• Solid Chest 1.5% 2857
• Solid Chest 1.3% 4149
• Alliance Chest 0.7% 105579
• Alliance Strongbox 0.7% 105570
• Horde Chest 0.7% 105578
• Solid Chest 0.7% 2855
• Witch Doctor's Chest 0.5% 141596
• Large Solid Chest 0% 153462