Need an upgrade to your favourite Nerf Zombie Strike Doublestrike blaster?Worker has a 5kg Spring upgrade for it to give your current Doublestrike blaster an FPS upgrade...
Worker 5kg spring upgrade for Elite Alpha Trooper. This is the best bang of your buck spring upgrade for your Elite Alpha Trooper!The package includes a 5kg main spring, a better O-ring for the breech, a silicone padding for the plunger tube to protect the Plunger rod from dry firing.This spring can..