This magazine follower is made of plastic. It is fully compatible with aftermarket airsoft magazine using the similar system
A.P.S. Magazine Follower for ACP601 GBB Pistol
Plastic Construction
Replace the standard magazine lips of airsoft pistol magazine
Increase the durability & stability
Suitable for A.P.S. CO2 Action Combat Pistol (ACP601) Series Airsoft Gas Blow Back Pistol