101Leafy researched the games.
AncientDrgnwoodCan

Wooden Bowgun with a muzzle like a lion. Fires rounds with the power of a deity.
It gives form to the lion known in the East as the "Raging God" and uses that image directly as its muzzle. Its square frame, built on dragonwood, delivers more power than its firing mechanism alone should. The reason is unknown, but many hunters say this heavy bowgun has the power to carry the user's own spirit into its shots.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 173.
| Class | Heavy Bowgun |
|---|---|
| Rarity | 10 |
| Attack | 444 |
| Slots | 2 |
| Reload | Fairly slow |
| Recoil | Fairly small |
| Table price | 13,000z |
Listed in the equipment tables of 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 792.
Ammo
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 792.
Materials
AncientDrgnwood ×4, YamaTsukamiFluid ×8, Thunderbug Jelly ×6, Mellanje Ore ×10