This magazine is designed for APS Air Pistol only. The capacity of this magazine is 18rds. It takes 1 x 12g Co2 Canister and the valve + O-Ring are reinforced to accept extreme strong pressure of Co2 gas. The end cap of the magazine has patented design of better gastification of Co2 

Selling points:

1. High Quality O-Ring for Co2 sealing is used
2. Reinforced Body Metal
3. Patented design of the End Cap of better gastification of Co2