101Leafy researched the games.
Black Gore Cannon

Made from Black Gravios Shell. One hit can rain down hell. Shelling Lv3
| Class | Gunlance |
|---|---|
| Rarity | 7 |
| Attack | 529 |
| Affinity | -10% |
| Defense | +8 |
| Slots | 1 |
| Shelling | Long Type Level 3 |
| Table price | 75,000z |
Upgrades
| Upgraded from | Black Gunlance |
|---|---|
| Upgrades into | Black Gore Buster |
Upgrade tree from モンスターハンターポータブル 2nd G 公式ガイドブック (Enterbrain, 2008), page 758.