A federal jury this week found a Harrisburg man guilty of five gun-related charges tied to what prosecutors described as a small-scale gun manufacturing operation run from his southern Illinois home that included guns made with a 3D printer. During a May 2024 search of property in Harrisburg belonging to Yaroslav Vishnevski and his then-wife, federal agents seized two unregistered homemade short-barreled rifles, silencers and two additional mo…