It is also inspiring imitation. Though several European countries are planning to buy the XM25, some of them, including Germany, are working on weapons that operate in the same way, but fire 40mm rounds. Such bullets are easier (and less expensive) to make than 25mm rounds. But starting with a smaller design increases the usefulness of the technology. It is easier to enlarge components than to shrink them, so the XM25 bullet design could, without too much trouble, be made to fit ammunition intended for weapons with larger-bore barrels. ATK has already begun modifying the technology to fit in the shells fired by marine-corps artillery pieces, according to Jeff Janey, the firm's vice-president of business development.