With the release of Modern Warfare 3, all of the weapons from Modern Warfare 2 have been included in the new title. While the 77 weapons from MW2 have the four mastery camos from that title, with the new Zombies mode there are another four mastery camos to unlock.
The Spinel Husk Camo is one of the Zombies' Mastery Camos for only the Modern Warfare 2 weapons that were carried over to this title. In total, there are 77 weapons but only 51 have to be completed for the next camo so players can be strategic with the weapons they choose to complete the challenges.
To obtain this camo players must have unlocked Golden Ivory Camo for a specific number of weapons in each weapon category. For example, players need to have unlocked Golden Ivory for 8 out of the 15 MW2 Assault Rifles to be able to unlock Spinal Husk.
To unlock Spinal Husk in Modern Warfare 3 for a specific weapon the weapon category requirement must be completed, the weapon itself has to have Golden Ivory unlocked, and then players have to get 300 kills with the weapon Pack-A-Punched. When all three of the requirements are fulfilled, Spinal Husk is unlocked.
Assault Rifles
*Only 8 out of 15 ARs must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Assault Rifles: TAQ-56, M4, STB 556, Kastov 762, M13B, Chimera, Iso Hemlock, Tempus Razorback, FR Avancer, M13C, TR-76 Geist, Lachmann-556, M16, Kastov-74u, & Kastov 545.
Battle Rifles
*Only 4 out of 5 BRs must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Battle Rifles: Lachmann-762, Cronen Squall, FTAC Recon, TAQ-V, & SQ-14
Submachine Guns
*Only 8 out of 12 SMGs must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Submachine Guns: Lachmann Shroud, ISO 9mm, PDSW 528, Vel 46, Fennec 45, BAS-P, Iso 45, Lachmann Sub, FSS Hurricane, MX9, MINIBAK, & Vaznev-9k
Shotguns
*Only 4 out of 6 Shotguns must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Shotguns: Lockwood 300, Expedite 12, Bryson 800, KV Broadside, MX Guardian, & Bryson 890
Light Machine Guns
*All 6 LMGs must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Light Machine Guns: Sakin MG38, RAAL MG, 556 Icarus, RAPP H, HCR 56, & RPK
Marksman Rifles
*Only 6 out of 8 MRs must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Marksman Rifles: EBR-14, SP-4 208, Lockwood MK2, Tempus Torrent, Crossbow, LM-S, SA-B 50, & TAD-M
Sniper Rifles
*Only 4 out of 7 Snipers must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Sniper Rifles: MCPR-300, Signal 50, Victus XMR, FJX Imperium, Carrack .300, LA-B 330, & SP-X 80
Melee
*The Riot Shield is the only weapon in this weapon class, and it must have Golden Ivory completed
Modern Warfare 2 Primary Melee Weapon: Riot Shield
Pistols
*Only 5 out of 8 Pistols must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Pistols: P890, .50 GS, X12, Basilisk, FTAC Siege, GS Magna, 9mm Daemon, & X13 Auto
Launchers
*All 4 Launchers must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Launchers: Pila, JOKR, RPG-7, & Strela-P
Secondary Melee
*Only 2 out of 5 Secondary Melees must have Golden Ivory completed to unlock Spinel Husk for any weapon in this category
List of Modern Warfare 2 Secondary Melee Weapons: Tonfa, Combat Knife, Dual Kodachis, Dual Kamas, & Pickaxe
