Is the nozzle in the gun blue? If it is it can take co2 but it will break sooner rather then later.
Propane is cheaper to operate.
Co2 will likely be to high powered for gaming with.
Also did you look to see if you can just buy the feed lip (i assume thats what broke cause its tbe only plastic on the mag)
Here i find
Stop dropping your mag. Lol jk it happens.