The 
WE 5.1 Hi-Capa magazine
 is a gas blowback airsoft magazine typically made of metal with a capacity of around 25 to 31 rounds, compatible with both WE and Tokyo Marui Hi-Capa pistols
 
Key Specifications
Specification 
Details
Capacity
Typically 25 rounds or 31 rounds (standard versions), with extended options up to 50 rounds or 350-round drum magazines available.
Compatibility
Designed for the WE 5.1 Hi-Capa series, but also widely compatible with other models in the WE Hi-Capa line (e.g., 4.3, 3.8) and most Tokyo Marui-compatible Hi-Capa pistols.
Propellant Type
Available in both green gas and CO2 versions, allowing users to choose their preferred power source.
Construction
Features a durable full metal alloy body with polymer feed lips and baseplate, providing a realistic weight and reliable build quality.
Loading
Loaded from the front using a speedloader, and filled with gas from a valve at the bottom of the baseplate.