--- product_id: 374501524 title: "WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500)" brand: "worker" price: "€ 81.38" currency: EUR in_stock: true reviews_count: 5 category: "Worker" url: https://www.desertcart.be/products/374501524-worker-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii store_origin: BE region: Belgium --- # Enhanced shooting range 18KG spring power boost Precision stainless steel build WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) **Brand:** worker **Price:** € 81.38 **Availability:** ✅ In Stock ## Summary > ⚡ Unleash Rival Power: Upgrade Your Kronos, Own the Arena! ## Quick Answers - **What is this?** WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) by worker - **How much does it cost?** € 81.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/374501524-worker-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii) ## 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 - • **Power Up Your Game:** 18KG upgrade spring delivers unmatched dart velocity for serious Nerf Rival Kronos users. - • **Custom Installation:** Designed for easy assembly—upgrade your blaster yourself and stand out on the battlefield. - • **Extended Range Mastery:** Boost your blaster’s shooting distance and dominate every match with precision shots. - • **Durable Stainless Steel:** Crafted from high-quality stainless steel for long-lasting performance and reliability. - • **Exclusive Compatibility:** Tailored specifically for Nerf Rival Kronos XVIII-500 to maximize performance without compromise. ## Overview The WORKER 18KG Upgrade Spring Silver is a premium stainless steel replacement spring designed exclusively for the Nerf Rival Kronos XVIII-500. It significantly enhances dart speed and shooting range, providing a competitive edge for players aged 14 and up. Assembly is required, making it perfect for enthusiasts who want to customize and elevate their blaster’s performance. ## 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! USE AT YOUROWN RISK! Modifying the blaster with third party parts may increase the wear on your blaster,May shorten the life of the blaster.Buy purchasing this product,you agree to understanding and accepting this risk. In addition, some blasters are very difficult to reassemble, and we won’t be able to troubleshoot problems caused by user errors. SPECIFICATIONS Model: W0336 Color: Silver Material: Stainless Product size (mm): 22*120mm, wire diameter 2.0mm 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 - 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! ## Technical Specifications | Specification | Value | |---------------|-------| | Product Dimensions | 11.94 x 2.03 x 2.03 cm; 18 g | | Manufacturer recommended age | 14 years and up | | Item model number | JGCWorker-959343 | | Number of Game Players | 1-2 | | Assembly Required | Yes | | Batteries Required? | No | | Batteries Included? | No | | Material Type(s) | Stainless Steel | | Color | Silver | | ASIN | B07S917BVH | ## Product Details - **Age range (description):** Teen - **Number of players:** 1-2 - **Brand:** WORKER - **Material:** Stainless Steel - **Colour:** Silver ## Images ![WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 1](https://m.media-amazon.com/images/I/41RDQOfUU3L.jpg) ![WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 2](https://m.media-amazon.com/images/I/51vrdnKWA4L.jpg) ![WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 3](https://m.media-amazon.com/images/I/31ehmZVZTIL.jpg) ![WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 4](https://m.media-amazon.com/images/I/41nkEVJQdIL.jpg) ![WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 5](https://m.media-amazon.com/images/I/317SACZtpKL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ This 18 kg spring will work You just need to be skilled. *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. ### ⭐⭐⭐⭐⭐ Super Powerful Spring *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. ### ⭐⭐⭐⭐ Does as advertised, too much for this blaster *by V***D on 13 June 2024* Product does as advertised and replaces stock spring, but then becomes nearly impossible to prime. Bought this to revive a blaster with a weak spring, ended up going with a stock spring and spacer. YMMV ## Frequently Bought Together - WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Nerf Rival 50 Accu-Round Refill Pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/374501524-worker-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii](https://www.desertcart.be/products/374501524-worker-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-24*