The spring on the AEG is the most important factor, besides compression parts, in relation to controlling the FPS of your AEG. Guarder is well known for producing high quality, reliable and consistent springs that will never disappoint.
Oil tempered spring design for improved durability and consistency
Compatible with nearly all Tokyo Marui spec gearboxes
Easy installation for FPS increase
Compatibility: For Tokyo Marui, Matrix and other compatible Airsoft Gearboxes Material: Steel