101Leafy researched the games.
Queen Blaster IV

Reliable deep green hunting Bow made from Rathian Shell. Can boost Poison effect.
| Class | Bow |
|---|---|
| Rarity | 9 |
| Attack | 336 |
| Slots | 2 |
| Price | 54,450z |
Upgrades
| Upgraded from | Queen Blaster III |
|---|---|
| Upgrades into | Queen Blaster V |
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 800.