101Leafy researched the games.
Lao-ShanLungCannon G

Crafted with the latest methods, it looks the same, but causes G-Level damage.
| Class | Heavy Bowgun |
|---|---|
| Rarity | 10 |
| Attack | 456 |
| Defense | +30 |
| Slots | 2 |
| Reload | Slow |
| Recoil | Small |
| Table price | 10,000z |
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 795.
Ammo
| Item | Load |
|---|---|
| Normal S Lv2 | 6 |
| Normal S Lv3 | 9 |
| Pierce S Lv3 | 3 |
| Pellet S Lv3 | 4 |
| Crag S Lv3 | 1 |
| Clust S Lv3 | 1 |
| Flaming S | 3 |
| Water S | 3 |
| Thunder S | 3 |
| Poison S Lv2 | 1 |
| Tranq S | 2 |
| Paint S | 2 |
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 795.
Materials
Commendation S ×1, Lao-ShanHvnlyScl ×1, Lao-Shan's Ruby ×2, ElderDragonBlood ×10