The 
RAVEN R22 gas magazine
 is a specific type of airsoft pistol magazine designed for the Raven R226 GBB pistol series and is made of metal with polymer feed lips
 
Magazine Details
Compatibility: Primarily designed for use with the RAVEN R226 Series airsoft replicas. They may also be compatible with other Tokyo Marui (TM) based full-metal Gas Blowback (GBB) replicas such as those from WE Airsoft and VORSK, although compatibility is not always guaranteed across all brands due to manufacturing tolerances.
Construction: Features a durable full-metal (CNC aluminium) body with polymer feed lips, follower, and base plate.
Capacity:
Standard magazine: Holds 21-24 rounds of 6mm BBs.