A stout outer shell, heavier than a carapace. Also known as Mediastinum.
| Hub G3 // Hunt-a-Thon: Gravios | Reward1 | x1 | 100% |
| Hub G3 // A Certain Gravitas | Reward1 | x1 | 100% |
| Hub G4 // A Very Long Engravement | Reward2 | x1 | 100% |
| Hub DLC // A Solid Argument | Reward2 | x1 | 100% |
| Hub G3 // Hunt-a-Thon: Gravios | Hunt 4 | x3 | 100% |
| Hub G3 // Hunt-a-Thon: Gravios | Hunt 2 | x1 | 60% |
| Hub G3 // Hunt-a-Thon: Gravios | Reward1 | x1 | 25% |
| Hub G3 // A Certain Gravitas | Reward1 | x1 | 25% |
| Hub G3 // A Certain Gravitas | Sub | x1 | 25% |
| Hub G4 // A Very Long Engravement | Reward2 | x1 | 25% |
| Special Permit // Drilltusk G3: Hunt | Sub | x1 | 25% |
| Hub DLC // A Solid Argument | Reward2 | x1 | 25% |
| Hub DLC // Capcom: Prowler's Spirit | Reward1 | x1 | 15% |
| Hub G4 // Gravios Backbreaker | Reward1 | x1 | 13% |
| Hub G4 // Fiery Four-way Fracas | Reward1 | x2 | 11% |
| Hub G4 // Marshland Fandango | Reward1 | x1 | 8% |
| Hub G4 // Death at My Greaves | Reward1 | x1 | 8% |
| Hub G4 // Arena Allegiances | Reward1 | x2 | 8% |
| A Certain Gravitas | Reward1 | x1 | 100% |
| A Certain Gravitas | Reward2 | x1 | 100% |
| A Certain Gravitas | Reward1 | x1 | 26% |
| A Certain Gravitas | Reward2 | x1 | 25% |
| Insect Glaive | Gravordius LV2 | x6 |
| Heavy Bowgun | Gravios Gigahowl LV3 | Key x5 |
| Light Bowgun | Titan Panzer LV3 | Key x6 |
| Sword & Shield | Black Doom Flame LV2 | Key x6 |
| Hammer | Graviton Hammer LV3 | Key x6 |
| Lance | Gravios Venom Spear LV2 | x6 |
| Gunlance | White Cannon LV2 | x6 |
| Insect Glaive | Gravordius LV3 | x4 |
| Hunting Horn | Volcanic Rock LV1 | x3 |
| Heavy Bowgun | Gravios Gigahowl LV4 | x5 |
| Long Sword | Titanic Makra LV5 | x4 |
| Sword & Shield | Black Doom Flame LV3 | x4 |
| Hammer | Two Star Silver Pot LV5 | x5 |
| Hammer | Graviton Hammer LV4 | x6 |
| Hammer | Barroth Momentum LV5 | x3 |
| Lance | Ceanataur Piercer LV7 | x3 |
| Lance | Basarios Venom Spear LV5 | x4 |
| Lance | Gravios Venom Spear LV3 | x4 |
| Bow | Hunter's Bravebow LV11 | x2 |
| Bow | Queen's Melody LV6 | x5 |
| Switch Axe | Blitzkrieg LV5 | x3 |
| Gunlance | White Cannon LV3 | x4 |
| Derring Vambraces X LV1 | x2 |
| Derring Guards X LV1 | x2 |
| Gravios Helm X LV1 | Key x5 |
| Gravios Mail X LV1 | Key x5 |
| Gravios Vambraces X LV1 | Key x3 |
| Gravios Tassets X LV1 | Key x3 |
| Gravios Greaves X LV1 | Key x3 |
| Gravios Cap X LV1 | Key x5 |
| Gravios Vest X LV1 | Key x5 |
| Gravios Guards X LV1 | Key x3 |
| Gravios Coat X LV1 | Key x3 |
| Gravios Leggings X LV1 | Key x3 |
| Auroros Tassets LV1 | x4 |
| Genesis Tassets LV1 | x4 |
| Borealis Tassets LV1 | x4 |
| Glyph Tassets LV1 | x4 |