A discharge assembly comprising: a housing having a body portion having a first end and a second end, the housing configured and dimensioned to be releasably mounted with respect to a vehicle or building to allow a user to use the housing in a portable fashion both within or away from the vehicle or building; an actuator within the housing, the actuator configured and dimensioned to fluidically separate the housing into a distinct first pressure chamber and a distinct second pressure chamber, the first pressure chamber housing a liquid-based firefighting agent prior to actuation of the actuator and the second pressure chamber housing and storing a pressurized fluid at about 300 psi (20.7 bar) prior to actuation of the actuator; a first end member enclosing the first end of the housing and having an outlet in fluid communication with a first valve, the first valve configured to allow: (i) the first pressure chamber to be filled with the liquid-based firefighting agent, and (ii) at least a portion of the liquid-based firefighting agent to be released via the first valve when actuated; an actuating member mounted with respect to the first valve; a second valve in fluid communication with the second pressure chamber, the second valve pressurizing, via the second valve, the fluid housed in the second pressure chamber to a pressure level prior to actuation of actuator; wherein the pressurized fluid in the second pressure chamber is pressurized, utilizing the second valve, to about 300 psi and the pressurized fluid at 300 psi is housed and stored in the second chamber prior to actuating the actuating member; wherein the actuator is a traveling piston head; wherein the actuator includes at least one groove configured to house a gasketing material that forms a fluid-tight seal between the actuator and the housing; wherein the housing includes an interior protrusion, the interior protrusion configured and dimensioned to allow the actuator to rest thereon prior to actuating the actuating member; wherein the first valve is a pressure actuated ball valve; and wherein the second valve is a Schrader valve; wherein upon actuation of the actuating member, the actuating member causes the first valve to open, thereby allowing for the release of the liquid-based firefighting agent from the first pressure chamber and through the outlet and to the first valve, and the housed and stored fluid pressure at the about 300 psi pressure level in the second pressure chamber moves the actuator towards the first pressure chamber, thereby forcing at least a portion of the liquid-based firefighting agent out of the first pressure chamber and through the first valve; wherein at least a portion of the liquid-based firefighting agent is forced out of the first pressure chamber regardless of the position of the housing relative to gravity. a housing having a body portion having a first end and a second end, the housing configured and dimensioned to be releasably mounted with respect to a vehicle or building to allow a user to use the housing in a portable fashion both within or away from the vehicle or building; an actuator within the housing, the actuator configured and dimensioned to fluidically separate the housing into a distinct first pressure chamber and a distinct second pressure chamber, the first pressure chamber housing a liquid-based firefighting agent prior to actuation of the actuator and the second pressure chamber housing and storing a pressurized fluid at about 300 psi (20.7 bar) prior to actuation of the actuator; a first end member enclosing the first end of the housing and having an outlet in fluid communication with a first valve, the first valve configured to allow: (i) the first pressure chamber to be filled with the liquid-based firefighting agent, and (ii) at least a portion of the liquid-based firefighting agent to be released via the first valve when actuated; an actuating member mounted with respect to the first valve; a second valve in fluid communication with the second pressure chamber, the second valve pressurizing, via the second valve, the fluid housed in the second pressure chamber to a pressure level prior to actuation of actuator; wherein the pressurized fluid in the second pressure chamber is pressurized, utilizing the second valve, to about 300 psi and the pressurized fluid at 300 psi is housed and stored in the second chamber prior to actuating the actuating member; wherein the actuator is a traveling piston head; wherein the actuator includes at least one groove configured to house a gasketing material that forms a fluid-tight seal between the actuator and the housing; wherein the housing includes an interior protrusion, the interior protrusion configured and dimensioned to allow the actuator to rest thereon prior to actuating the actuating member; wherein the first valve is a pressure actuated ball valve; and wherein the second valve is a Schrader valve; wherein upon actuation of the actuating member, the actuating member causes the first valve to open, thereby allowing for the release of the liquid-based firefighting agent from the first pressure chamber and through the outlet and to the first valve, and the housed and stored fluid pressure at the about 300 psi pressure level in the second pressure chamber moves the actuator towards the first pressure chamber, thereby forcing at least a portion of the liquid-based firefighting agent out of the first pressure chamber and through the first valve; wherein at least a portion of the liquid-based firefighting agent is forced out of the first pressure chamber regardless of the position of the housing relative to gravity.