WELL PRO KS1/KS3 30Rds M4 GBB Magazine 
 
Green Gas Magazine for Well Pro AR15 / M4 GBB Platforms
30-round Magazine Capacity for 6mm
Compatitable with VFC AR15 / M4 GBBR (minor modidication ?)
STANAG Design
Switch to Enable or Disable Last Round Bolt Hold
Steel Internal Components Magazine
Alloy Housing with Nylon Upper
STANAG Black Finish
Compatible with VFC GBBR
WELL PRO : MAG-KS-GAS