Lightweight Parts

Reviewed for Patch 1.0.503Last updated: August 24, 2026

A clean, no-strings Bullet Attack boost that fits every gun build and asks nothing in return. Stays relevant longer than most Commons — the definition of a safe pick.

QUICK ANSWER

Identify the object first, then decide whether its trigger is already alive in your run.

  • Read the practical pick rule
  • Check the connected tags and related items
  • Test the slot in the Planner
VISUAL INDEX04 ICONS
Weapon
Weapon
Relic
Relic
Skill
Skill
Tarot
Tarot

Identify the object first, then read the decision behind it.

Relic

Lightweight Parts

Common · Updated for patch 1.0.503

Quick answer

PICK IT WHEN

Take it when survival or consistency is the reason the run ends. The reliable, safe signals describe the kind of problem it is meant to solve.

WATCH OUT

Do not spend a damage slot on it when the run is already safe and a core engine pick is available.

What this item is trying to do

Lightweight Parts is not a universal upgrade. Its route tags are reliable, safe, and that combination tells you what kind of problem the entry is meant to solve. Start with the current effect, then check whether your run is already producing the event that gives the entry value.

This page treats the effect and route connections as a decision aid, not as a promise of a fixed ranking. The current effect reads: “·Bullet Attack +75%” That wording matters because a rarity label can stay the same while the route around it changes after a patch. The practical question is whether Lightweight Partsimproves the run you have, at the moment you can actually take it.

What the effect means in a run

A relic is a slot decision. It can be powerful and still be wrong when its trigger is not part of the current route or when another slot fixes a more immediate failure.

reliable entries have value because they work without a perfect sequence of offers, which makes them useful during a pivot safe entries trade some ceiling for consistency, so they should be judged by the failed-run problem they remove

The route connections point to the trigger it is explicitly connected to. It is also connected to no named Hunter route uses this entry as a core choice yet. Those connections are clues, not automatic instructions: a skill can be listed for a Hunter and still be the wrong answer when that run has a different immediate bottleneck. Compare the entry with the other offers on screen before spending the slot.

Early, middle, and late run decisions

Early run: prove the trigger

Early in a run, take Lightweight Parts only when you can say what it will do in the next few rooms. Take it when survival or consistency is the reason the run ends. The reliable, safe signals describe the kind of problem it is meant to solve. If the entry needs a second item, a particular element, or a later checkpoint, mark that dependency and keep a simple fallback in mind. An early pick is valuable when it starts a route or removes a failure that is already happening; it is fragile when it asks the run to become something entirely different.

Middle run: check whether the route paid back

In the middle of the run, stop judging Lightweight Parts by the promise of its text. Look for the event it was supposed to improve: more useful shots, more controlled rooms, a cleaner boss window, or a safer route through the next checkpoint. If that event is not showing up, the correct move can be to keep the item as a placeholder while changing a support slot, or to pivot before the run spends another choice on the same idea.

Late run: protect the win condition

Late in the run, Lightweight Parts should have a job that can be named in one sentence. Keep it if it contributes to the trigger it is explicitly connected to and the effect is still active in the actual loadout. Replace or ignore it when the route has already solved that problem and a missing survival, reload, or target-coverage answer is now more likely to end the run.

Boss, crowd, and fallback use

For bosses, ask whether the entry improves sustained access to the target or only creates a brief high roll. For crowds, ask whether it reduces the number of dangerous enemies that remain after one action. Lightweight Parts has no explicit boss-or-crowd label here, so use the trigger and effect text to decide where it belongs.

If Lightweight Parts does not appear, use a replacement that preserves the same job rather than chasing the exact name. Related entries include Book of Skills, Deadly Amulet, Flame Gem, Frost Amulet. A lower-ceiling option that keeps the element, trigger, or survival plan intact is usually a better fallback than an unrelated rare drop. Do not spend a damage slot on it when the run is already safe and a core engine pick is available.

How to test this pick without inventing DPS

  1. Write down the current Hunter, weapon, active tags, and the reason the run is considering Lightweight Parts. Do not change several slots at once; otherwise the result cannot tell you what helped.
  2. Open the Planner with Lightweight Parts selected and read the synergy explanation. Confirm that the entry is connected to a real trigger, not only to a shared word in the tag list.
  3. Test one crowded room and one durable target when the route reaches them. Record uptime, missed triggers, reload gaps, and the moment the run becomes safer or more fragile. A single run is an observation, not a universal damage measurement.
  4. Reopen this page after the next patch and compare the current effect with the previous one. If the tooltip changes, downgrade the advice until the interaction has been checked again.

Limitations and the next decision

The planner does not claim a measured DPS ranking for Lightweight Parts. It explains route fit from the current effect, tags, element, Hunter links, and evidence label. That is deliberately narrower than saying the item is always best. The useful output is a reasoned next choice that you can verify in the run.

If this entry fits, load it into the Planner and compare the next skill, relic, and Tarot choice. If it does not fit, return to the item library, filter by the missing trigger, and choose a replacement that fixes the failure you can actually see. That loop is more reliable than copying a static tier list without checking the run state.

Route guidance

Current effect text

·Bullet Attack +30%

Forged effect

·Bullet Attack +75%

What this entry connects to

Need to see the interaction in a full loadout? The Planner scores the tags and element together, then flags conflicts instead of pretending it has measured DPS.

Test this decision in the Planner →

Related picks

This page brings together the item's current effect, route connections, and practical tradeoffs. Compare it with the in-game tooltip after an update, then revisit the route. See how the sources are used.