Upgrade the power of your Nerf Rival Kronos XVIII-500 Blaster with our Kronos XVIII-500 Blaster Upgrade Spring. Made from high-quality piano steel, this 10kg / 11.5kg / 13kg spring will increase your blaster's shooting distance and precision. Comes with o-rings for easy installation. Step up your game today!

Specifications:

Material: piano steel

Spring Type: 10kg / 11.5kg / 13kg

Package includes: 1x Nerf Rival Kronos XVIII-500 Blaster spring upgrade mod with o-rings