An adjustable gas block for a gas operated firearm is provided that offers the user a means by which the volume of gas being directed to the host rifle’s operating system can be adjusted. A display apparatus including the container and a method of manufacturing the display apparatus are further provided. After determining which communications protocol the system is using, a compatible communications protocol is selected from one of several communications protocols stored in a device’s memory. Actuation of the restore switch will restore the television receiver to a state of operation responsive to the user-selected stored data based on the user’s settings of the user-programmable switch. A portion of the retainer is configured to be disposed within a first one of the sleeves and coupled to at least one of the seat and the support frame such that a position of the seat relative to the support frame is adjustable by disposing the portion of the retainer within a second one of the sleeves.