replacement cartridge for dis-charger

[Buff1958]

I ordered a CO 2 dis-charger from Ox yoke and really like it as a way to unload my rifle. The threads on the cartridge is smaller than the ones I have here at the house.
Ox-yoke doesnt offer replacements.
Where is a good source for them?

 

[Maven]

You can buy CO2 cartridges inexpensively and in bulk fro your local bike shop. Be sure to take your discharger with you to test whether the bike shop cartridges fit.