--- product_id: 172147442 title: "18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500)" brand: "worker" price: "€ 21.26" currency: EUR in_stock: true reviews_count: 12 category: "Worker" url: https://www.desertcart.es/products/172147442-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii-500 store_origin: ES region: Spain --- # 18KG spring power boost Enhanced ball speed & range Skill-required custom installation 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) **Brand:** worker **Price:** € 21.26 **Availability:** ✅ In Stock ## Summary > 🚀 Power up your game with precision and punch! ## Quick Answers - **What is this?** 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) by worker - **How much does it cost?** € 21.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/172147442-18kg-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 - • **Heavy-Duty Performance:** Experience a noticeably tougher pull, signaling serious power in every shot. - • **Compatibility Guaranteed:** Specifically engineered for the Nerf Rival Kronos XVIII-500—no guesswork, just pure performance. - • **Unleash Maximum Firepower:** Upgrade your Nerf Rival Kronos with an 18KG spring for explosive shooting range and velocity. - • **DIY Installation Challenge:** Show off your tech-savvy side by installing this upgrade yourself—tutorials included for the savvy pro. - • **Precision Requires Mastery:** Fine-tune your blaster’s accuracy post-installation to dominate every match. ## Overview The WORKER 18KG Upgrade Spring Silver is a high-tension replacement spring designed exclusively for the Nerf Rival Kronos XVIII-500. It significantly boosts shooting range and ball speed, demanding a skilled installation and post-upgrade accuracy adjustments. Note: Blaster not included. ## Description Product description PLEASE NOTE Compatible with Nerf Rival Phantom Corps Kronos XVIII-500 The smaller the number of kilograms, the less difficult it is to modify. The product is suitable for people over 14 years old Please be careful installing the parts to avoid damage to your Nerf! 18KG Upgrade Spring SPECIFICATIONS Model: W0336 Color: Silver Material: Stainless Steel Product Size: 22 x 120mm, Wire Diameter 2mm Product Weight: 17.43g Packing Size: 50 x 190mm Package Weigh: 19.66g Package included: 1x Spring Set 18KG Upgrade Spring for Nerf Rival Phantom Corps Kronos XVIII-500 The spring has been tested before they come out to the marketplace. And we have designed different lengths and strengths so that to improve the shooting performance. By the way of lengthening the spring, the Kronos XVIII-500 will have greater power. There is no problem with the quality of our spring. But It does not determine that the buyer can install it successfully. Because of the cooperation of the transmitter and the spring makes people unable to pass, this is a human factor beyond our control. If you encounter difficulties during installation, we have some installation instructions or videos for support to show how to complete the Kronos XVIII-500 upgrade. Imported Piano Wire with an Anti-Fatigue Oxide Layer, Low Attenuation. Modification Upgrade, Replace the Original Spring, Improve Performance Initial Peed,Range, Accuracy. 100% Brand New and High Quality. It can Promote Shooting Range and Dart Speed. 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 | B07S917BVH | | Age Range Description | Teen | | Best Sellers Rank | #248,185 in Toys & Games ( See Top 100 in Toys & Games ) #901 in Toy Foam Blasters | | Brand Name | WORKER | | Color | Silver | | Customer Reviews | 4.2 out of 5 stars 199 Reviews | | Educational Objective | Develop basic mechanical skills and hand-eye coordination through assembly and use | | Indoor Outdoor Usage | Outdoor | | Is Assembly Required | Yes | | Item Dimensions | 4.7 x 0.8 x 0.8 inches | | Manufacturer | WORKER | | Manufacturer Maximum Age (MONTHS) | 168 | | Manufacturer Minimum Age (MONTHS) | 168.00 | | Manufacturer Part Number | JGCWorker-959343 | | Material Type | Stainless Steel | | Model Number | JGCWorker-959343 | | Number of Players | 1-2 | | Operation Mode | Manual | | Set Name | Spring Set | | Size | 18 KG | | Supported Battery Types | No batteries required | | Theme | Nerf Rival | | Unit Count | 1.0 Count | ## Images ![18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 1](https://m.media-amazon.com/images/I/41RDQOfUU3L.jpg) ![18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 2](https://m.media-amazon.com/images/I/51vrdnKWA4L.jpg) ![18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 3](https://m.media-amazon.com/images/I/31ehmZVZTIL.jpg) ![18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) - Image 4](https://m.media-amazon.com/images/I/41nkEVJQdIL.jpg) ![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 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. ### ⭐⭐⭐⭐⭐ good option *by W***M on August 11, 2025* a lot stronger. definitely not for kids ## 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.es/products/172147442-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii-500](https://www.desertcart.es/products/172147442-18kg-upgrade-spring-silver-for-nerf-rival-kronos-xviii-500) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-06-08*