How to Upgrade Weapons in Splatoon Raiders

Frye’s Weapon Stash is your armory

Weapons in Splatoon Raiders still spray ink from your refillable tank, but the campaign twists the series formula with heavy drop variety—more than 100 weapon variations—plus a Hideout Ship economy. Frye runs the Weapon Stash, where you upgrade keepers, break down extras into materials, and decide which rare powers deserve Spirhalite investment.

This guide covers what to keep, when to scrap, how upgrades interact with tanks and relics, and how farming routes feed the stash. For the broader early loop, see Getting Started. For shard income, use How to Farm Spirhalite. Catalog unfamiliar drops with Weapons and Items.

Where weapon power actually comes from

A strong loadout is rarely “the gun alone.” It is the stack of:

1. Weapon base kit and rare modifiers (efficiency, unique optimizations, special traits).
2. Weapon Stash upgrade ranks purchased or crafted through Frye.
3. Tank stats from the Mechanic’s Shack (attack, HP, later gadget slot unlocks).
4. Gadgets tied to Power / Speed / Tactical (see How to Use Gadgets).
5. Relic Powers that bend a tank’s behavior.
6. Bot Buddy Showstoppers amplified by Bond (How to Increase Bot Buddy Bond).

If a new drop feels weak, check whether your tank and gadgets are underbuilt before you scrap a promising frame.

How to use the Weapon Stash well

After raids, visit Frye and sort inventory into three piles:

• Main keepers — Weapons that match your preferred ranges and tank synergy. Upgrade these first.
• Situational keepers — Niche tools for shield dens, long hallways, or restricted facilities. Upgrade slowly.
• Scrap fodder — Duplicates and clear downgrades. Convert them into materials rather than hoarding forever.

Upgrade spending should follow your campaign bottleneck. If Boss Salmonids shrug off your ink, prioritize damage ranks. If you constantly run dry mid-den, chase efficiency or ink-related optimizations. Cross-check community strength rankings on the Tier List and full kits on Builds, but do not ignore a drop that simply feels great in your hands.

Spirhalite budgeting for weapons

Spirhalite Shards also fuel tank upgrades, gadgets, and facilities. A practical split for mid-game sessions:

• Keep a reserve for emergency weapon ranks before a story dungeon from the Walkthrough.
• Spend overflow on the stash after a dedicated farm route.
• Avoid dumping every shard into a weapon you will replace after the next island unlock.

Because difficulty never changes loot, you can farm shards on Tourist and still feed high-end stash upgrades. That is intentional—read the Difficulty Guide if you are tempted to suffer Survivalist purely for “better drops” that do not exist.

Rare weapons and Salmonid drop etiquette

Boss and Seasoned Salmonids are prime sources of exciting weapons and Mega Power Eggs. When you see a rare trait, park it in the situational pile until you understand the modifier. Big Man’s catalog helps identify what you found; Frye helps decide whether it is stash-worthy.

In co-op, remember rewards are individual. You are not racing teammates for the same physical drop pile, but you should still call out dens that are good for weapon hunting so the group can repeat them. Unlock and lobby steps: How to Play Co-op.

Synergy checklist before you invest

Ask these questions before a big upgrade spend:

• Does this weapon’s optimal range match my tank’s gadgets? (Example: Power Spinwheel pushes forward—pair with mid-range splatters that capitalize on opened space.)
• Do I already own a similar keeper at a higher effective rank?
• Will a relic or gadget part give a cheaper power spike this week?
• Am I upgrading because of vanity rarity or because the kit clears my next dungeon?

If answers are fuzzy, run one more dens route with the unupgraded weapon. Practical testing beats spreadsheet panic. Track trials on the Raid Checklist.

Scrap without regret

Scrapping is healthy. Inventory bloat hides good options and slows Hideout decisions. Scrap when:

• You have duplicates with worse traits.
• A weapon’s role is fully covered by a higher-ranked keeper.
• You urgently need materials to finish a stash project that unlocks the next story gate.

Do not scrap the last copy of an unusual optimization until Big Man’s catalog entry makes its niche obvious. Storage is cheaper than rediscovering a deleted solution.

Example upgrade session

1. Clear a short den on Raider for shards and parts.
2. Talk to Frye; scrap three duplicates.
3. Put two ranks into your main shooter or slosher.
4. Visit Shiver only if a gadget slot is the real bottleneck.
5. Raise Frye Bond if she is underleveled so Showstopper support matches your stash investment.
6. Relaunch the same den or the next Walkthrough objective.

That cadence keeps the Weapon Stash moving without starving other systems. For a wider systems map, return to the Guides Hub or skim the Review for how weapon growth fits the campaign’s pacing. Master Frye’s counter and your ink will feel like a workshop product—not a random Salmonid hand-me-down.