For decades, artist David Hess has assembled life-size sculptures of assault rifles from what he calls “rescued” objects — everything from an old black sneaker and vintage turquoise sewing machine, to a raggedy crutch and pink Barbie bike frame — to foster dialogue about one of the most volatile issues of our time. UMBC’s Center for Art, Design and Visual Culture hosted “Gun Show,” the first-ever display of all 112 sculptures, this fall, as curated by Kathy O’Dell, associate professor of visual arts and special assistant to the dean for education and arts partnerships.