Hi,
you can use a KWC Gas Valve for Mini UZI / Sigma SW40F / Desert Eagle CO2 Version
Install this gas valve into Co2 gas magazines of KWC GBB ( Mini UZI / Sigma SW40F / Desert Eagle CO2 Version ). Use a tool (code : Z50 , not included and will be available later) with screwdriver to take away all the intenal parts from Co2 magazine as small picture.
test result below:
1. UZI delievers 350fps with Top Gas. It can shoot 29rd bbs in semi mode / 15rd bbs in full auto mode.
2. Sigma SW40F delievers 370fps with Top Gas.
3. Desert Eagle delievers 350fps with Top Gas.
Also you c