101Leafy researched the games.
Lao-Shan Lung Cannon

Heavy Bowgun created from Lao-Shan Lung material. Very powerful and defensive.
| Class | Heavy Bowgun |
|---|---|
| Rarity | 5 |
| Attack | 300 |
| Defense | +10 |
| Slots | 1 |
| Reload | Slow |
| Recoil | Small |
| Table price | 6,000z |
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 784.
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 784.
Materials
Lao-Shan's Shell ×4, Lao-Shan's Scale ×6, Rathalos Plate ×1, Dragonite Ore ×10