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Monster Hunter World (MHW)

Rex Arms I | Weapon Stats and Required Materials

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This is a guide to the Rex Arms I weapon and its upgrades in the game Monster Hunter World (MHW) and the Iceborne expansion. Find out the details and stats of this weapon and what materials are needed to upgrade it!

List of Contents

Rex Arms I Base Stats

Rex Arms I
 Weapon Image
Rarity Attack Affinity Elem.
10 900 -15 Blast 330
Def. Elderseal Custom Slots
- - - ーーー
Hidden Element This weapon's element is Hidden and will require the Free Elem/Ammo Up skill to unlock.
Phial Type Impact Phial
Sharpness
 Sharpness

How to Get and Craft Rex Arms I

Required Materials for Rex Arms I

Thick Bone x5
Tigrex Shard x4
Tigrex Hardclaw x3
Monster Slogbone x3

Weapon Tree for Rex Arms I

Bone Tree

★Bone Strongarm I
　┗Bone Strongarm II
　　┣Bone Strongarm III
　　┃　┗Hard Bone Strongarm I
　　┃　　┣Hard Bone Strongarm II
　　┃　　┃　┗Hard Bone Strongarm III
　　┃　　┃　　┗Mighty Strongarm I
　　┃　　┃　　　┗Mighty Strongarm II
　　┃　　┃　　　　┗Wild Force I
　　┃　　┃　　　　　┗Wild Force II
　　┃　　┃　　　　　　┣Wild Force III Attack Icon.png972 | (Blast Element (MHW).png330)
　　┃　　┃　　　　　　┗Ice Guardian
　　┃　　┃　　　　　　　┗Regal Daruq Attack Icon.png972 | Ice Element (MHW).png240
　　┃　　┗Diablos Wall I
　　┃　　　┗Diablos Wall II
　　┃　　　　┗Diablos Tyrannis I
　　┃　　　　　┗Diablos Tyrannis II
　　┃　　　　　　┗Diablos Tyrannis III
　　┃　　　　　　　┣Thanatos Force Attack Icon.png1044 | (Ice Element (MHW).png240)
　　┃　　　　　　　┗Sulfurteinn Machmar
　　┃　　　　　　　　┗The Melting Grasp Attack Icon.png1044 | (Paralysis Element (MHW).png270)
　　┣Jagras Strongarm I
　　┃┣Jagras Strongarm II
　　┃┃┗Jagras Strongarm III
　　┃┃　┗Jagras Escudo I
　　┃┃　　┣Jagras Escudo II
　　┃┃　　┃┗Jagras Escudo III
　　┃┃　　┃　┗Saber's Maw I
　　┃┃　　┃　　┣Saber's Maw II Attack Icon.png936 | (Sleep Element (MHW).png330)
　　┃┃　　┃　　┗Scorching Demander
　　┃┃　　┃　　　┗Scorching Demander+
　　┃┃　　┃　　　　┗Glavenus Bardred Attack Icon.png936 | Fire Symbol (MHW).png390
　　┃┃　　┗Gama Silt I
　　┃┃　　　┗Gama Silt II
　　┃┃　　　　┗Gama Escudo I
　　┃┃　　　　　┣Gama Escudo II Attack Icon.png864 | Blast Element (MHW).png240
　　┃┃　　　　　┗Rex Arms I
　　┃┃　　　　　　┣Rex Arms II Attack Icon.png972 | (Blast Element (MHW).png360)
　　┃┃　　　　　　┗Accursed Arms Attack Icon.png1008 | (Sleep Element (MHW).png240)
　　┃┗Girros Strongarm I
　　┃　┗Girros Strongarm II
　　┃　　┗Girros Nadja I
　　┃　　　┗Girros Nadja II
　　┃　　　　┣Girros Nadja III
　　┃　　　　┃┗Naaga Ghadab I
　　┃　　　　┃　┣Naaga Ghadab II Attack Icon.png864 | Paralysis Element (MHW).png420
　　┃　　　　┃　┗Dios Strongarm
　　┃　　　　┃　　┗Volatile Blade Attack Icon.png936 | Blast Element (MHW).png390
　　┃　　　　┗Hazak Aspida I
　　┃　　　　　┗Hazak Aspida II
　　┃　　　　　　┣Deathaxe Aspida Attack Icon.png900 | Dragon Element (MHW).png420 | Elderseal Icon.png- Average
　　┃　　　　　　┗Hydros Kardia Attack Icon.png972 | Water Symbol (MHW).png330
　　┗Pulsar Strongarm I
　　　┗Pulsar Strongarm II
　　　　┣Pulsar Strongarm III
　　　　┃┗Kadachi Kaina I
　　　　┃　┗Kadachi Kaina II
　　　　┃　　┗Kadachi Kaina III
　　　　┃　　　┗Kadachi Soul I
　　　　┃　　　　┣Kadachi Soul II Attack Icon.png828 | Thunder Element (MHW).png330
　　　　┃　　　　┗Viper's Venom I
　　　　┃　　　　　┗Viper's Venom II Attack Icon.png900 | Poison Element (MHW).png360
　　　　┗Garon Strongarm I
　　　　　┗Garon Strongarm II
　　　　　　┗Hate's Undying Flame
　　　　　　　┗Odium
　　　　　　　　┗Odium+
　　　　　　　　　┣Animus Attack Icon.png828 | (Fire Symbol (MHW).png300)
　　　　　　　　　┗Nether Candle
　　　　　　　　　　┗Grudge Attack Icon.png864 | Dragon Element (MHW).png330 | Elderseal Icon.png- High

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