101Leafy researched the games.
Crab Buster G

Crafted with the latest methods, it looks the same, but causes G-Level damage.
| Class | Heavy Bowgun |
|---|---|
| Rarity | 9 |
| Attack | 384 |
| Defense | +16 |
| Slots | 2 |
| Reload | Fairly slow |
| Recoil | Medium |
| 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 794.
Ammo
| Item | Load |
|---|---|
| Normal S Lv1 | 6 |
| Normal S Lv2 | 6 |
| Normal S Lv3 | 9 |
| Pierce S Lv1 | 3 |
| Pierce S Lv2 | 3 |
| Pellet S Lv1 | 4 |
| Clust S Lv1 | 1 |
| Water S | 3 |
| Freeze S | 3 |
| Recov S Lv1 | 3 |
| Recov S Lv2 | 3 |
| Para S Lv1 | 3 |
| Para S Lv2 | 1 |
| Tranq S | 2 |
| Paint S | 2 |
| Armor S | 1 |
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 794.
Materials
Commendation S ×1, Hermitaur Claw+ ×8, HvyHermitaurShl ×8, Black Pearl ×20