KJ Works KP-17 23rds Gas Magazine For KP-13/17/18 GBB
 
KJW Gas Magazine For KJW G Series
KJW G Series, Including KP-13, KP-17, KP-18 
Gas Source: H134a (8kgs) And Toy Gas (12kgs)
Capactity: 23+1 6MM BB
Compatitable with Tokyo Marui G Series And Marui Cloned like WE, ARMY..etc
KJ Works : KP-17-GAS-MAG