Question re. x-chambers

[IAMJaws]

What is the best x-chamber avail. for the 'mags right now???

I AM

[Xzion]

Ive heard the ACI Sub Zero Expansion Chambers are pretty good, though your best bet would be to go with compressed air/nitro if its an option, much more consistant and cleaner than CO2, but that route isnt always an option for everybody.