Patrick Sweeney is an American gunsmith (retired), originally from Detroit, Michigan. According to an interview with Shotgun World magazine, he is a well-known author in the field of gunsmithing. Retired from gunsmithing, his writes full-time. He teaches law enforcement classes on the patrol rifle, and gunsmithing the AR-15.
In addition to writing books, he is the Handguns Editor of Guns & Ammo magazine.