A gas turbine engine has a fan section, a gear arrangement configured to drive the fan section, a compressor section, including both a low pressure compressor section and a high pressure compressor section. Tactical attachments or devices such as laser illumination sights, flashlights, magazine extension tubes, and breaching tools are interchangeable and attached with a single adapter mounted to the end of a magazine ammunition tube. Furthermore, the activatingdeactivating portion prevents the switching control operation of the driving portion from being switched from the deactivated state to the activated state from a time point that constant voltage feeding operation of a constant voltage portion is switched from the deactivated state to the activated state until a predetermined period elapses. During a brewing cycle, liquid is delivered from the thus isolated metering chamber to the brewing chamber for combination with the beverage medium contained in the filter cartridge.