Abstract: A kit for the direct use of a variety of medical ampoules of differing sizes, with a syringe, the kit having: a syringe body; a syringe plunger having a hollow interior volume; and a plurality of ampoule interface elements, each one being interchangeably received within the hollow interior volume and configured for deployment between an outer surface of the medical ampoule and a surface of the hollow interior volume so as to hold the medical ampoule therein, each of the plurality of ampoule interface elements having an outside diameter sized to fit an inside diameter of the hollow interior volume, wherein a first of the ampoule interface elements has an inside diameter for receiving a medical ampoule of a first size, and a second of the ampoule interface elements has an inside diameter different from the first inside diameter for receiving a medical ampoule of a second size.