101Leafy researched the games.
WyvernBoneGunlance G

Latest improvement methods boost this up to G-Level standards. Shelling Lv4
Apart from the shelling mechanism and the parts that serve as its frame, almost all of it is made of wyvern bone, and its lightness and ease of use make it a beginner's weapon. Its performance as a weapon is not high, but because it is so light, it is also favored by skilled hunters who watch for an opening and slam Wyvern's Fire into a monster.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 165.
| Class | Gunlance |
|---|---|
| Rarity | 9 |
| Attack | 644 |
| Slots | 0 |
| Shelling | Normal Type Level 4 |
| Table price | 100,000z |
Materials
Commendation G ×1, Hrd Monster Bone ×8, Massive Bone ×5, Burst Arrowana ×10