---
product_id: 157151396
title: "14KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Blaster Upgrade - 1x Spring Set"
brand: "worker"
price: "R$173"
currency: BRL
in_stock: true
reviews_count: 12
category: "Worker"
url: https://www.desertcart.com.br/products/157151396-14kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii-500
store_origin: BR
region: Brazil
---

# Improves shooting range & speed 18kg power boost Requires skilled installation 14KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Blaster Upgrade - 1x Spring Set

**Brand:** worker
**Price:** R$173
**Availability:** ✅ In Stock

## Summary

> 💥 Power up your Kronos, dominate the arena!

## Quick Answers

- **What is this?** 14KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Blaster Upgrade - 1x Spring Set by worker
- **How much does it cost?** R$173 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/157151396-14kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii-500)

## 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

- • **Crafted for Kronos:** Perfectly compatible with Nerf Rival Kronos XVIII-500 blaster
- • **Childproof & Durable:** Heavier prime effort adds safety and longevity to your blaster
- • **Precision Range Upgrade:** Significantly extends shooting distance for competitive edge
- • **Skill-Driven Installation:** Installation demands patience and technical know-how—join the elite modders
- • **Unleash Maximum Firepower:** 18kg spring delivers a serious boost in FPS and impact

## Overview

The WORKER 14KG Upgrade Spring Silver is a high-quality stainless steel spring designed exclusively for the Nerf Rival Kronos XVIII-500. Delivering an 18kg tension, it significantly boosts dart speed and shooting range up to 165 FPS. Installation requires technical skill and patience, making it ideal for experienced modders seeking enhanced blaster performance and durability.

## Description

DESCRIPTION 1.Compatible with Nerf Rival 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! SPECIFICATIONS Model: W0335 Color: Silver Material: Stainless Product size (mm): 22*120mm, wire diameter 1.8mm Packing size (mm): 50*190mm in bags PACKAGE INCLUDED 1x Spring Set

Review: This 18 kg spring will work You just need to be skilled. - 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: Super Powerful Spring - 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

- Compatible with Nerf Rival Kronos XVIII-500 only.
- Promote shooting range and ball speed, but need to adjust the blaster's accuracy by yourself.
- Installing this spring for Kronos requires the player to have some skill level, or learn how to install it by watching a tutorial video.
- After installation, the load will be very laborious. Please check whether the parts are installed correctly before installing the screws.
- Blaster not included!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SFD6D7R |
| Best Sellers Rank | #205,483 in Toys & Games ( See Top 100 in Toys & Games ) #860 in Toy Foam Blasters |
| Customer Reviews | 4.2 4.2 out of 5 stars (198) |
| Item Weight | 1.44 ounces |
| Item model number | JGCWorker-67999 |
| Manufacturer | WORKER |
| Manufacturer recommended age | 0 - 12 years |
| Package Dimensions | 6.57 x 2.99 x 0.87 inches |

## Images

![14KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Blaster Upgrade - 1x Spring Set - Image 1](https://m.media-amazon.com/images/I/51zkoZxL-3L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ This 18 kg spring will work You just need to be skilled.
*by M***. on July 22, 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.

### ⭐⭐⭐⭐⭐ Super Powerful Spring
*by J***N on January 26, 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.

### ⭐⭐⭐⭐ nice upgrade with slit mod
*by A***. on November 20, 2022*

I had to cut mine down by little over an inch. It was just rediculously strong. Works great now. Not to hard on the slide pull but still much improved over stock.

## Frequently Bought Together

- WORKER 14KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Blaster Upgrade - 1x Spring Set
- Nerf Rival 50 Accu-Round Refill Pack

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-20*