Unleashed Performance Stage 1 Mod Kit for Nerf Raider This kit includes metal trigger catch, 2x double strength trigger catch springs, reinforcement plate, and 5+ kg mainspring (2.5kg stock). When installed, the Raider shoots 80fps muzzle velocity with up to 55ft range (parallel to ground) and up to 65ft range (30 degrees angled to ground). Mod at your own risk! Increasing the spring tension can break or damage stock internal components of your blaster. Blaster not included.