Monster Hunter Wiki:Sandbox

Manga Stuff
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 * Hunting Whip - It has no proper name or category, and Shadow wonders how to call it: Shuryouben (狩猟鞭, "Hunting Whip") or Tasetsuben (多節鞭, "Multi-section Whip").

Sword
Soufuujin (双風刃) is a pair of Dual Swords used by Shiki Ryûhô in the manga Monster Hunter Orage. They're said to be crafted from Myo Galuna scales, giving them the special, extremely rare element of wind.

In the beginning of the manga they are named Soufuujin [Oroshi] (双風刃【颪】, "wind from mountains"). When they are damaged by the acid of Delma-Ioprey, Sakya fixes and upgrades them into Soufuujin [Arashi] (双風刃【嵐】, "Storm") with the Delma-Ioprey materials. Later, Kibalion upgrades them into the powerful Soufuujin [Kami Arashi] (双風刃【神嵐】, "Divine Storm").

Bowgun
Justice Bowgun (ジャスティスショット) is a Light Bowgun from the manga Monster Hunter Orage. It was created by Sakya in a cave while she was fighting against Delma-Ioprey with Shiki and Ailee, and it becomes her main weapon. Later, Kibalion upgrades it into the Beltines (ベルティネス).

(Why サキャ if it's サクヤ?)

Armor
The Kelbikini (ケルビキニ) is a bikini armor in the manga Monster Hunter Orage that is made with 5 Kelbi Hides, 5 Carpenterbugs, 5 Kut-Ku Coins, and 4 Resort Tickets. One quest to hunt a Plesioth had as requirement the participing hunters to wear this armor set.

(Kinda like the "Mega Kut-Ku" DLC quest)