Nerf modders and enthusiasts, this Worker 25N long spring is exactly what you need to take your Retaliator blaster to the next level! With super huge elasticity generating more than 16 kilograms of force, this upgrade spring significantly boosts your dart's shooting range and velocity. The silver stainless steel construction is built for durability and consistent performance. Important note - this spring is specifically designed for use with Nerf Retaliator blasters equipped with Lightweight Shoulder Stock and compatible with Worker Prophecy-R Model Power Type Kits. Installation requires some technical know-how, so be careful when assembling to avoid damaging your blaster. This is just the spring - the blaster and other components are sold separately. The quality is professional-grade, and the performance improvement is noticeable immediately after installation. Whether you're preparing for a Nerf battle or just love modding your blasters for maximum performance, this upgrade spring delivers the power boost you're looking for. The 28g weight feels substantial, and the 215x20x20mm size is specifically engineered for Retaliator compatibility. If you're serious about Nerf modding and want that competitive edge, this Worker spring is a must-have upgrade that transforms your blaster's performance dramatically.