No, they will not. Unless they themselves have a compressor and tanks they cannot.
why ask me
Almost all paintball guns fit standard 5, 9 or 20 oz tanks as well as air tanks.
Compressed air tanks were around long before paintball.
Usually specialized paintball "pro shops" that sell paintball markers, paint[balls] in quantities of 2000 or so, paintball gear (apparel, safety googles air tanks), and may offer refills for air tanks. Usually there will be one within a paintball field or pretty close to one, and some may may be miles away from the nearest field.
No, they must be filled (and not with air). The only exception is the silver 12 gram cartridges for pistols and stock class guns.
Air tanks come from russian bollets made from solfer umonier
T-Square Paintball, Jacksonville Arkansas
They need the small sealed CO2 cartridges, not the screw on tanks. but yes they need Co2 to function.
You can use co2 tanks if they are the anti-syphon tanks or if you put that on your tank put even then they are not recommended.
Every .68 caliber hopper has a standard size feed neck. All tanks have the same threads.
Cheap co2 tanks are about $20. Carbon air tanks go all the way up to $125 or so