The MAG Dual Power CO2 Conversion Kit for A&K SVD is available again and you can find it in stock at eHobby Asia. Please do check if the power upgrade meets your local laws as the muzzle velocity can be high when this is used and might just not be allowed in your country... "MAG Dual Power CO2 Conversion Kit for A&K SVD is of full metal construction and you can convert your airsoft rifle from Air-Cocking to CO2 Gas-Power. This is suitable for the A&K SVD Series Airsoft Sniper Rifles.

Package include CO2 Container, 300% High Prower Spring, Original Spring, Cylinder Head, Recoil Spring guide stand, CO2 Container and Spring guide

Using High Prower Spring, One cartridge CO2 can shoot about 50 round bullets. Using Original Spring, One cartridge CO2 can shot about 120 round bullets."