Monster Hunter World is packed with progression systems, but none are more important than weapon upgrades. Your weapon is the core of your build, your damage output, and your overall effectiveness in hunts. If you cannot upgrade your weapon, it can feel frustrating, especially when you are staring at the smithy screen wondering what you are missing.
The good news is that most upgrade issues come down to a few common reasons. Once you understand how the weapon tree works, how materials are revealed, and how progression gates function, upgrading becomes much easier to manage. Here is a deeper look at the most common reasons why you cannot upgrade your weapon in Monster Hunter World and what you can do about it.
You Do Not Have Enough Zenny
This is one of the most straightforward reasons, especially for newer players. Every weapon upgrade costs Zenny, and early in the game you do not earn large payouts from hunts. If you are progressing quickly and constantly upgrading armor and weapons, your funds can disappear faster than you expect.
Optional quests are one of the best ways to earn extra Zenny. They often reward solid payouts and can be completed relatively quickly once you outgear the monsters. Investigations are even better if they offer high Zenny rewards. Pay attention to quests that specifically show higher monetary returns.
Another tip is to avoid unnecessary crafting. If you are upgrading weapons frequently, try to hold off on building every armor set you unlock. Selling excess monster parts or trade-in items can also help boost your balance. Managing your resources early will make progression smoother later.
You Have Not Collected the Required Materials
This is the most common reason players cannot upgrade their weapon. When you see question marks under a weapon in the smithy tree, it usually means you have not discovered one or more required materials.
Monster Hunter World hides materials until you obtain at least one of that item. For example, if a weapon upgrade requires a rare monster drop that you have never obtained, the game will display it as unknown. Once you hunt that monster and acquire the part, the requirement becomes visible.
Sometimes the material is tied to a monster you have not encountered yet in the story. In that case, you simply need to progress further through assigned quests. Other times it may require breaking specific monster parts during a hunt. Tail cuts, horn breaks, and other part-specific drops can unlock those missing materials.
If everything shows as question marks and you cannot see the path forward, chances are you need to advance the main story or hunt a new monster.
You Have Not Unlocked the Next Tier in the Weapon Tree
Weapon progression in Monster Hunter World follows a branching tree system. You cannot jump ahead to higher-tier weapons without first crafting or upgrading through earlier tiers in that branch.
If you notice that certain weapons have nothing underneath them, it usually means that branch has not been unlocked yet. This can happen if you have not crafted the base weapon for that tree. Some branches require you to forge a specific starting weapon before upgrades become available.
Story progression also plays a major role. As you complete assigned quests and raise your Hunter Rank, new weapon tiers unlock. If you are playing without the Iceborne expansion, your progression caps at Rarity 8 weapons. Iceborne introduces Master Rank, which significantly expands the weapon trees and allows upgrades beyond that point.
If you feel stuck, check your assigned quests and make sure you are advancing through the main storyline. New areas, monsters, and materials unlock as you progress.
Additional Things to Keep in Mind
Some upgrades require monster parts from High Rank or Master Rank versions of monsters. Hunting a Low Rank version will not provide the same materials. Make sure you are selecting the correct difficulty tier when farming materials.
Also remember that some weapons branch into entirely different trees depending on your choices. If you want to follow a specific elemental or status path, you may need to backtrack and craft a different base weapon to access that branch.
Final Thoughts
If you cannot upgrade your weapon in Monster Hunter World, it almost always comes down to one of three things. You are missing Zenny, you have not collected the required materials, or you have not progressed far enough in the weapon tree.
Take time to review the weapon tree carefully, hunt new monsters, complete optional quests for extra Zenny, and push through the story when needed. Once you understand how the system works, upgrading becomes second nature.
Weapon progression is one of the most satisfying parts of Monster Hunter World. With the right materials and a little patience, you will always find a way forward.