---
product_id: 710742397
title: "WORKER 18KG Upgrade Spring Silver for Nerf Rival Phantom Corps Kronos XVIII-500"
brand: "worker"
price: "€ 56.90"
currency: EUR
in_stock: true
reviews_count: 5
category: "Worker"
url: https://www.desertcart.fi/products/710742397-worker-18kg-upgrade-spring-silver-for-nerf-rival-phantom-corps
store_origin: FI
region: Finland
---

# Boosts dart speed & range Stainless steel durability 18kg high-tension power WORKER 18KG Upgrade Spring Silver for Nerf Rival Phantom Corps Kronos XVIII-500

**Brand:** worker
**Price:** € 56.90
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your Nerf game with precision and punch!

## Quick Answers

- **What is this?** WORKER 18KG Upgrade Spring Silver for Nerf Rival Phantom Corps Kronos XVIII-500 by worker
- **How much does it cost?** € 56.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/710742397-worker-18kg-upgrade-spring-silver-for-nerf-rival-phantom-corps)

## Best For

- worker enthusiasts

## Why This Product

- Trusted worker brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unleash 18kg Raw Power:** Transform your Kronos with a spring that delivers serious knockdown force and up to 165 FPS—dominate every Nerf battle.
- • **Childproofed for Safety:** Heavier spring means harder priming, adding a layer of safety by making it less accessible to younger players.
- • **Range & Speed Amplified:** Experience a noticeable jump in dart velocity and shooting distance—leave stock springs in the dust.
- • **DIY Upgrade for the Skilled:** Requires careful assembly and priming—perfect for pros who love hands-on customization and mechanical mastery.
- • **Precision Engineered Stainless Steel:** Crafted from premium stainless steel for unmatched durability and consistent performance under pressure.

## Overview

The WORKER 18KG Upgrade Spring in sleek silver is a high-tension stainless steel replacement spring designed exclusively for the Nerf Rival Phantom Corps Kronos XVIII-500. It significantly boosts dart speed and shooting range, delivering up to 165 FPS. This upgrade demands careful, skilled installation and priming, making it ideal for experienced modders seeking enhanced performance and durability without shell modifications. Note: Blaster not included.

## Description

DESCRIPTION1.Compatible with Nerf Rival Phantom Corps Kronos XVIII-5002.100% New and high quality.3.It can promote shooting range and dart speed.4.This spring is only for Nerf Blaster toy,All parts are separate,and the product included small parts, you need to install and assemble your blaster,Please be careful installing the parts to avoid damage to your Blaster!5.Blaster not included!SPECIFICATIONSModel: W0336Color: SilverMaterial: StainlessPackage Weight: 70gPackage Size:120×100×35mmPACKAGE INCLUDED1x Spring Set

Review: 18 kg of power, this is a fantastic way of boosting your blaster it is definitely slightly longer than the stock spring. I read a bunch of reviews prior to this purchase saying that this spring is impossible to put in to this blaster. That is not the actual deal behind that You just have to be very careful and have the time and patience and the skill to compress that spring before reinserting it back into the blaster. Definitely need to be on a solid table plunger side down spring on top and have considerable weight to lock it into place. That being said you should have some knowledge on how to break down any particular item that you're working with. I would suggest to people that who are doing so don't let anybody that is not experienced to be working or replacing a spring that heavy. This is not something for children to try with their parents if anything keep them out of distance because that spring definitely has some built up kinetic energy when compressing. I would also suggest not to let any children play with this blaster after installing that particular spring. It is also harder to prime which is not a bad thing. Kind of makes it even more child proof then before. There is definitely a considerable difference. It has such great knockdown power that when I say knock down power there was a difference of sound and impact when I had used it at the same footage that I did with the stock spring from a light tap sound on the wall to a heavy loud thud sound. I wish I had made a video for this that would have been totally impressive to show that you can use that spring in a Kronos blaster. You do not need to make any cuts you just need to have time patience and some weight behind it and not be afraid to be hit by a spring if it does get released because it is a possibility that if you do not correctly handle the spring while pre-priming it before putting it back into the blaster it can rock you a little bit and not being said I've worked around spring before and it can rock you and take you to the hospital. But I'm not here to just diss encourage anybody but to encourage doing so buy using some common sense and some safety glasses.
Review: First off, those who say it doesn’t fit; you all need to learn how to modify your blasters. That or just stop, because obviously you are going to hurt yourselves. Upgrading the spring does take a lot of work but it does fit. You need to manually prime the spring and lock it in place outside of the blaster. For a good guide, look up Captain Xavier’s videos on how to put a Kronos back together. The people who say it is hard to prime are correct. The 18kg spring is harder to prime than the venerable k25 spring. You also get higher FPS as a result. That said, to prime this sucker, you are going to want to install a T-bar. While Worker sells an aluminum one, i recommend the 3D printed one made by SMEnterprises on Etsy. No shell cutting requires (unlike the Worker brand) and it is sturdy enough to prime the blaster. Expect ranges up to 165 FPS with this spring.

## Features

- 1.Compatible with Nerf Rival Phantom Corps Kronos XVIII-500
- 2.100% New and high quality.
- 3.It can promote shooting range and dart speed.
- 4.This spring is only for Nerf Blaster toy,All parts are separate,and the product included small parts, you need to install and assemble your blaster,Please be careful installing the parts to avoid damage to your Blaster!
- 5.Blaster not included!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07S917BVH |
| Assembly Required | Yes |
| Batteries Included | No |
| Batteries Required | No |
| Colour | silver |
| Country of Origin | USA |
| Customer Reviews | 4.0 4.0 out of 5 stars (124) |
| Date First Available | 2 April 2020 |
| Educational Objective(s) | Develop basic mechanical skills and hand-eye coordination through assembly and use |
| Item Dimensions LxWxH | 11.9 x 2 x 2 Centimeters |
| Item Weight | 18 g |
| Item model number | JGCWorker-959343 |
| Manufacturer | Worker |
| Manufacturer recommended age | 8 months - 14 years |
| Material Type(s) | Stainless Steel |
| Model Number | JGCWorker-959343 |
| Number of Game Players | 1-2 |
| Product Dimensions | 11.94 x 2.03 x 2.03 cm; 18 g |
| tech_spec_battery_description_toys | No batteries required |

## Product Details

- **Brand:** WORKER
- **Colour:** silver
- **Item Package Quantity:** 1
- **Style:** Classic
- **Item dimensions L x W x H:** 11.9 x 2 x 2 Centimeters

## Images

![WORKER 18KG Upgrade Spring Silver for Nerf Rival Phantom Corps Kronos XVIII-500 - Image 1](https://m.media-amazon.com/images/I/41RDQOfUU3L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***. on 22 July 2025*

18 kg of power, this is a fantastic way of boosting your blaster it is definitely slightly longer than the stock spring. I read a bunch of reviews prior to this purchase saying that this spring is impossible to put in to this blaster. That is not the actual deal behind that You just have to be very careful and have the time and patience and the skill to compress that spring before reinserting it back into the blaster. Definitely need to be on a solid table plunger side down spring on top and have considerable weight to lock it into place. That being said you should have some knowledge on how to break down any particular item that you're working with. I would suggest to people that who are doing so don't let anybody that is not experienced to be working or replacing a spring that heavy. This is not something for children to try with their parents if anything keep them out of distance because that spring definitely has some built up kinetic energy when compressing. I would also suggest not to let any children play with this blaster after installing that particular spring. It is also harder to prime which is not a bad thing. Kind of makes it even more child proof then before. There is definitely a considerable difference. It has such great knockdown power that when I say knock down power there was a difference of sound and impact when I had used it at the same footage that I did with the stock spring from a light tap sound on the wall to a heavy loud thud sound. I wish I had made a video for this that would have been totally impressive to show that you can use that spring in a Kronos blaster. You do not need to make any cuts you just need to have time patience and some weight behind it and not be afraid to be hit by a spring if it does get released because it is a possibility that if you do not correctly handle the spring while pre-priming it before putting it back into the blaster it can rock you a little bit and not being said I've worked around spring before and it can rock you and take you to the hospital. But I'm not here to just diss encourage anybody but to encourage doing so buy using some common sense and some safety glasses.

### ⭐⭐⭐⭐⭐ Review
*by J***N on 26 January 2024*

First off, those who say it doesn’t fit; you all need to learn how to modify your blasters. That or just stop, because obviously you are going to hurt yourselves. Upgrading the spring does take a lot of work but it does fit. You need to manually prime the spring and lock it in place outside of the blaster. For a good guide, look up Captain Xavier’s videos on how to put a Kronos back together. The people who say it is hard to prime are correct. The 18kg spring is harder to prime than the venerable k25 spring. You also get higher FPS as a result. That said, to prime this sucker, you are going to want to install a T-bar. While Worker sells an aluminum one, i recommend the 3D printed one made by SMEnterprises on Etsy. No shell cutting requires (unlike the Worker brand) and it is sturdy enough to prime the blaster. Expect ranges up to 165 FPS with this spring.

### ⭐ Review
*by N***N on 14 April 2023*

I like another reviewer did not analyse the details of the spring, and I did not measure the spring from my Kronos before ordering. It doesn't fit! (See the pictures, it is the one on the right) and isn't an exact match for diameter either. Stay away folks.

## Frequently Bought Together

- WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500)
- Nerf Rival 50 Accu-Round Refill Pack

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-19*