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Getting the prosthetic arm in Excry means finishing the workshop unlock chain first, then crafting the arm at the armory bench instead of buying it from any vendor. The two gates that stop most players are faction reputation and a single quest-gated component — the neural calibration chip — which cannot be farmed and only drops as a chain reward. Plan the material loop around that chip and you can have the Mk I arm within a couple of hours of play rather than a couple of days.
📋 Table of Contents
- What the prosthetic arm actually does
- Prerequisites you should clear first
- Step-by-step: unlocking and crafting the arm
- Required materials and where to get them
- NPCs you will deal with, and what each one is for
- Stats comparison across the three tiers
- Durability realities and common mistakes
- Frequently Asked Questions
- Related Guides
What the prosthetic arm actually does
The prosthetic arm is a craftable limb-slot item that replaces your default arm and adds a flat bonus to handling and melee stability while applying a weight penalty. It is not cosmetic, and it is not a straight upgrade — it trades mobility for control, which is why the tier you pick matters more than whether you own one at all. Excry patches its crafting and reputation systems fairly often, so treat the numbers below as the current live-build figures and confirm the exact labels in your own crafting menu before you commit materials.
Prerequisites you should clear first
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- Armory bench unlocked. The bench is gated behind the workshop’s introductory crafting task. Without it, the recipe will not appear in your list even if you hold every material.
- Faction reputation at tier 2. The quartermaster will not hand over the schematic below tier 2. Reputation comes from repeatable contracts, not from the main story.
- Roughly 1,800–2,200 in-game currency for the bench fee and the first round of binding alloy. Prices fluctuate with the in-game market, so hold a buffer.
Step-by-step: unlocking and crafting the arm
Each step below exists for a reason; skipping one usually means a wasted trip rather than a failed quest.
- Talk to the workshop NPC in your faction hub. This starts the unlock chain and flags the armory bench as a valid crafting station. Do this before you gather anything — the chain changes one material requirement partway through, and gathering early can leave you holding the wrong component.
- Complete the three contract steps of the chain. These are deliberately short combat/collection tasks. Their real purpose is to raise your reputation to the threshold the quartermaster checks.
- Collect the neural calibration chip from the chain’s final hand-in. This is the only non-farmable component. If you complete the chain without it — usually by handing in at the wrong NPC — you have to re-run the final step.
- Buy the schematic from the faction quartermaster. It costs currency, not reputation, and it is account-bound once purchased.
- Farm the four farmable materials (table below). Run these as a loop rather than one at a time; the industrial district and the mining nodes are close enough to clear in a single run.
- Craft at the armory bench. Crafting takes a short in-game timer. Do not log out mid-craft if your build punishes it — some players report losing the queue and the materials with it.
- Equip and calibrate. The arm needs one calibration pass at the bench after crafting, otherwise the handling bonus does not apply and you only carry the weight penalty.
Required materials and where to get them
Quantities below are the current live-build requirements for the Mk I arm. Higher tiers scale these up rather than replacing them.
| Material | Quantity (Mk I) | Source | Typical farm time |
|---|---|---|---|
| Servo assembly | 3 | Dismantling downed mechs in the industrial district | 15–20 min each |
| Reinforced polymer plate | 4 | Salvage crates; restocks at the outpost trader | ~10 min total |
| Neural calibration chip | 1 | Quest chain reward only — not farmable | Chain-gated |
| Binding alloy | 12 | Mining nodes, then smelting at any forge | 20–30 min total |
| Mid-tier power cell | 1 | Crafted from 2 scrap cells | ~5 min |
| Bench fee (currency) | 1,800–2,200 | Contracts, vendor sales, salvage | Varies |
NPCs you will deal with, and what each one is for
| NPC role | Where to find them | What they give you |
|---|---|---|
| Workshop NPC | Faction hub, crafting wing | Starts the unlock chain; unlocks the armory bench |
| Faction quartermaster | Faction hub, requisitions desk | Sells the schematic at reputation tier 2+ |
| Salvage trader | Industrial district outpost | Polymer plates; occasional servo assemblies |
| Repair technician | Any safe-zone workshop | Durability repair — cheaper here than at field vendors |
One location note that saves real time: the quartermaster and the workshop NPC are in the same hub, so buy the schematic on the same trip you start the chain. The salvage trader is a separate map zone and is the only one worth a dedicated run.
Stats comparison across the three tiers
Numbers below are the crafting-menu values in the current build. Weight penalty is the one players underrate — it affects dodge timing, not just carry capacity.
| Tier | Handling / stability bonus | Weight penalty | Repair cost per cycle | Extra requirement |
|---|---|---|---|---|
| Mk I Field Prosthetic | +8% | 3.2 kg | Low (2 binding alloy) | None beyond the chain |
| Mk II Servo Arm | +14% | 4.6 kg | Medium (5 binding alloy) | Reputation tier 3, +6 servo assemblies |
| Mk III Overclocked | +21% | 6.1 kg | High (9 binding alloy) | Reputation tier 5, rare drop from group content |
Which tier fits your situation
- New or returning player, low currency: Mk I. The +8% is small but the low repair cost means you are not bleeding materials every session.
- Melee-focused build, comfortable with weight: Mk II. It is the best value per material spent — roughly 2.4% handling per extra binding alloy cycle compared with Mk I.
- Group content main, high currency and reputation: Mk III. Worth it only if you already clear the group content that drops its component; otherwise the repair cost outweighs the gain.
- Dodge-reliant or movement-heavy build: stay on Mk I or skip the arm entirely. The weight penalty scales faster than the handling bonus at the top tier.
Worked example: is the upgrade worth the materials?
Say you run about four hours a week. Mk I costs 12 binding alloy to craft and 2 per repair, and you will repair roughly twice a week — 4 alloy weekly, so 48 alloy over a 12-week season, plus the 12 to craft: 60 alloy total. Mk II costs 12 to craft plus 6 servo assemblies, and 5 alloy per repair: 10 alloy weekly, 120 over the season, for 132 alloy. You are paying 72 extra alloy and six servo assemblies — about 40–50 minutes of farming — for 6% more handling. If your build already lands its hits, that is a bad trade. If your build misses because of stability, it is a good one.
Durability realities and common mistakes
- Binding alloy is the consumable that actually drains you, not the craft cost. Budget it weekly, not once.
- Repair at the safe-zone technician. Field vendors charge noticeably more for the same repair cycle.
- Do not hand in the chain at a field NPC. The calibration chip is only issued at the hub hand-in, and re-running the final step is the single most common waste of time.
- Calibrate before you judge the item. An uncalibrated arm gives you the weight penalty with no bonus, which is why some players conclude the arm is useless.
- Do not over-upgrade early. Mk III repair costs can outpace a mid-game income, leaving you with a broken limb slot and no materials to fix it.
Frequently Asked Questions
Can I buy the prosthetic arm instead of crafting it?
No. There is no vendor that sells the finished arm. The quartermaster sells the schematic only, and the arm itself is produced at the armory bench. If a player is offering to trade you one, treat it as a scam unless the game’s trade system explicitly supports crafted limb items in your build.
Is the neural calibration chip farmable?
It is not. It is issued as a chain reward at the hub hand-in, and it has no drop table. If you lose or consume it, you re-run the final step of the unlock chain rather than farming a boss or a node for it.
What reputation tier do I need?
Tier 2 is the minimum to buy the schematic, tier 3 for the Mk II upgrade, and tier 5 plus a group-content drop for the Mk III. Reputation comes from repeatable faction contracts, which are faster than story progress for this purpose.
Why is my prosthetic arm not showing a bonus?
You most likely skipped the calibration pass. The arm requires one calibration at the bench after crafting before the handling and stability bonus applies. Until then it only contributes weight.
Does the prosthetic arm affect dodge or movement?
Yes, indirectly. The weight penalty adds to your total carried weight, which slows dodge recovery at higher tiers. Mk I is usually safe for movement builds; Mk III is generally not.
How long does the whole unlock take?
For a player already at reputation tier 2, roughly two to three hours: about an hour for the chain, an hour for the material loop, and the rest for currency farming. The reputation grind is the long pole if you are starting from tier 0.
