CONCORD , N . H . AP A western Massachusetts man who authorities say assembled assaultstyle rifles and brought them to New Hampshire is headed to federal prison . Raymond Blackmer III , of Easthampton , Massachusetts , was sentenced Tuesday in Concord to more than five years behind bars . He pleaded guilty to one count of illegal possession of a firearm by a convicted felon . Authorities say Easthampton police learned last year that Blackmer was purchasing component parts for firearms on the internet and selling those assembled rifles over state lines . Police say officers pulled Blackmer over in Winchester , New Hampshire in November 2015 and seized two AR 15 style rifles and other items . His attorney says 52 yearold Blackmer agreed to plead guilty in New Hampshire to avoid further prosecution on similar charges in Massachusetts .