Steel Fighters lets you mix and match parts from more than 100 robots. Recent gameplay recordings show six build positions: Head, Torso, Left Arm, Right Arm, Left Leg, and Right Leg. Use those as the current working slots, then confirm the labels and requirements in your own build panel before spending resources.
A useful parts guide records what the game displays and compares a complete robot. It does not infer hidden stats from color, call a screenshot rarity official, or rank an isolated part without the assembly, upgrades, and test floor that produced the result.
Six-slot build checklist
Head
Record the displayed name, source robot, level, visible values, effect text, and acquisition route. Leave unshown fields blank.
Torso
Capture the same fields and the complete-build preview before replacing it. A large single value may carry a tradeoff elsewhere.
Left Arm
Keep the side label. Do not assume a right-arm copy fills this position or that mirrored parts behave identically.
Right Arm
Compare it in the complete assembly. Preserve a usable copy until duplicate and Fusion rules are clear.
Left Leg
Record only displayed contributions. Visual size or movement animation does not prove a stat or passive effect.
Right Leg
Verify whether matching source, level, or another condition changes the final build summary before confirming.
Record a part before changing the robot
For every part you may equip, write its exact name, slot, source robot, displayed level, rarity label if shown, visible stats or effect, where you obtained it, and the UTC check date. Add Official, In-game verified, Community corroborated, Community reported, or Needs in-game testing so another player can judge the record.
Then capture the complete robot summary. A part can look stronger in isolation while weakening another interaction or breaking a set condition. Without the before and after summaries, the later Arena result cannot be tied confidently to the swap.
Build at the Craft Station
Current recordings place a Build Robot action at a Craft Station and show a 0/6-style selection state before all positions are filled. Open the station, select one part for every required slot, inspect the final preview, and confirm only when the result matches the intended six choices.
If the interface charges Cash, Scrap, a part, or another resource, read the current button rather than using an old example price. One dated recording showed a leveled part with a Cash cost, but a single example cannot establish the full cost curve.
Give the completed robot a test label and save the six-part record. This protects the baseline if a later interface sorts inventory differently or a replacement cannot be undone.
Matching parts and the reported Perfect benefit
Several current community guides report a Perfect trait or benefit when all six parts come from the same robot, sometimes describing a +10% stat effect. This value is not published on the official Roblox listing. Treat it as Community reported until the current build summary visibly confirms it for your assembly.
Compare the full matching set against the best mixed set you own. Hold robot level, upgrades, Title, permanent boosts, and Arena test constant. A matching benefit can still lose if its individual parts are much weaker; a mixed set can still lose if the current client applies an important complete-set effect.
Sources of parts
The official description confirms a large mix-and-match collection, while Update 1 confirms more robots, an Index, and a Spin Wheel. Current gameplay and guides also refer to a lever, social-reward parts, Fusion, and other progression sources. Read the current source panel before recording one of these as an acquisition route.
Use exact labels: lever purchase, social reward, event wheel, mode reward, Index reward, Fusion result, or another displayed source. Do not turn a part seen in a video into a guaranteed drop. A single drop cannot establish odds, rarity frequency, or pity behavior.
Keep, build, or fuse
Keep a part when it fills the only usable copy of a slot, completes a documented set, advances the Index, or has not been tested. Build when the six-part preview solves a current robot need or creates a controlled comparison. Fuse only after the panel shows the consumed robots or parts, the result, the cost, and whether the action is reversible.
Titles include community-corroborated milestones for robot building and Fusion, but a progress counter does not make every build or fusion efficient. Complete useful account goals first. Use unwanted duplicates only after the Index and side-specific requirements are understood.
Compare one change at a time
Choose a reachable Arena floor, record the current robot and result, replace one part, and rerun the same floor. Compare survival, clear reliability, recovery, and any visible output. Repeat enough to separate a consistent difference from one unusual attempt.
If the result improves, keep the new part and note the solved problem. If it worsens, restore the baseline when possible. Changing several slots, upgrades, and Titles together prevents the test from identifying the useful change.
Common part mistakes
- Inferring rarity from color without reading the displayed label.
- Treating left and right limbs as interchangeable without confirmation.
- Fusing the only copy needed for a complete robot or Index row.
- Ranking parts from different levels, upgrades, Titles, or permanent boosts.
- Publishing one pull as a drop rate.
- Calling the reported Perfect value official when the current UI was not checked.
Continue to the Robot Index to record collection state, then use Robot Builds to turn the six-part sheet into a repeatable Arena decision.
Sources checked 2026-10-27
- Official Steel Fighters experience — 100+ robot parts and mixing premise.
- Official Update 1 event — Index, Spin Wheel, more robots, and upgrades.
- Dated gameplay and current independent guides — six-slot interface and matching-set reports; verify exact values live.