101Leafy researched the games.
Blue Blade Bow III

Acutely angled Bow. Letting loose some non-elemental shafts is easy with this.
A hunting bow with sharp-angled design on every part, from the frame to the quiver. The strength that came from working the hard shell, claws, and talons of the "Blade Crab" gave it the astonishing power to pierce even the hardest scales. It is, however, a hunting bow that asks for a fair amount of arm strength from its user.
Our translation of 復刻 ハンター大全 (KADOKAWA / Enterbrain, 2014), page 176.
| Class | Bow |
|---|---|
| Rarity | 9 |
| Attack | 360 |
| Slots | 1 |
| Table price | 90,100z |
Upgrades
| Upgraded from | Blue Blade Bow II |
|---|---|
| Upgrades into | Showroom Model, Carmine Bow |
Can also be made new at the smithy.
Upgrade tree 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 798.
Materials
HvyCeanataurShl ×5, HrdCeanataurClaw ×3, Giant Blk Pearl ×2, Hvy Monster Bone ×3