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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →To level a weapon in Arknights: Endfield, add weapon EXP using dedicated weapon EXP materials or other weapons. Arms Inspector-series items are identified as weapon EXP materials. Tuning is a separate action, not the step that adds levels.
How weapon leveling works
Weapon leveling uses EXP: apply weapon EXP materials or other weapons as EXP fodder. The END Wiki’s system tutorial identifies both inputs and lists Arms Inspector-series materials as usable across levels. It does not establish item-by-item EXP values or a complete cost table.
Before consuming another weapon, check the upgrade screen’s preview. The available sources do not establish a universal best choice or compare the EXP value and opportunity cost of each input.
Leveling and tuning are different actions
Adding EXP raises a weapon’s level. Tuning is a separate weapon-progression action: the END Wiki’s Cast Die reference identifies Cast Die as a tuning material. Do not treat tuning as the level-up step.
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Choose a weapon for an Operator
The official release preview describes a matching-weapon feature on the Operator – Weapons screen. It recommends a weapon based on an Operator’s skills and attributes, which can help with weapon selection; it does not upgrade the weapon. Read the official release preview.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Check the current game for caps and costs
In its January 17, 2026 release preview, the Arknights: Endfield Team said it lowered Operator and weapon level caps for official release and increased the availability and quantity of early-game progression materials. These release changes mean older guides may show figures that no longer apply. Exact current caps, material costs, T-Cred costs, menu steps, and farming locations are not established by the sources cited here, so check the weapon’s in-game upgrade screen for the values in your current version.
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