Spring guides for your AEG replica, available from brands like Action Army, Prometheus, Element, Guarder, Madbull, SHS etc ...
The name says it all, the Spring guide guides the spring and makes sure it stays neatly in place when the gearbox is in operation.
Spring guides have to be gearbox compatible which means that if you have a V2 gearbox, you'll need a V2 Spring guide.
