In Marcheno, just north of Brescia, a gleaming new Caesar Guerini factory climbs from a hillside, its architecture fused from elements of Classical antiquity and the 21st Century. Three stories in height, it has an entrance framed by a stylized Roman victory arch, and atop the arch is a portrayal of an emperor astride his horse, pointing forward as if leading legions into battle. In Italy, where image is everything, it is a building—and a gunmaker—that is consciously making a statement….