Rocket Airsoft M150 AEG Spring - Japanese Black Steel airsoft pistol for beginners This is the GEN 4

This is the GEN 4 edition of the full frame Glock 17

except that it's for AEGs

85mm Feeder Length (to fit magazine): 6mm Material: Aluminum 6061

and G series

Rocket Airsoft M150 AEG Spring - Japanese Black Steel airsoft pistol for beginners This is the GEN 4Rocket Airsoft M150 AEG Spring Japanese Black Steel. One of our most popular airsoft upgrade springs! Very high quality steel made spring to get your gun running a high FPS. Fits in all standard gearboxes. This is your standard upgrade spring strength for upgrades. This is a non linear spring utilizing Japanese made steel spring material. Black color to differentiate spring types.