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: : I have a volumizer for my gun. I am going to be purchasing some new equiptment for it, and was wondering about a low pressure chamber. Does it do the same thing as a volumizer? If not, what does it do and does anyone have any suggestions on the matter. : They are the same thing, and I definitely prefer the term "volumizer" as it is more descriptive, as they have absolutely no effect on gas pressure. : What they do is increase the air space immediately adjacent to the paintgun valve. If your paintgun has a very small amount of space next to the valve, like some older models, there is a limit to how low the operating pressure can be before the velocity drops to an unacceptable level. If your paintgun suffers this problem (most modern blowbacks have larger volume areas next to the valve making it a non-issue) then adding a volumizer will increase the amount of gas, and can help allow the paintgun to continue to function properly when fed a lower pressure gas from a regulator. : Either way though, flow rate of the gas fittings and the regulator that is used to lower the pressure is as important, if not more important than the airspace next to the valve. A "volumizer" can trick you into having shoot-down. If your gas-thru grip and or regulator are restrictive, you'll get good velocity single shots at the chrono, but with each shot the pressure in the volumizer drops and must be recharged by the regulator. If you fire faster than it can recharge, your velocity will drop under rapid fire, decreasing your range (also called shoot-down). : See you on the field, : -Bill Mills