In the late 19th century, the Rockwellian city of Plymouth, Michigan, became the breeding ground for competitive air-rifle companies, putting this still-thriving suburban Detroit community on the map. Plymouth's Air Rifle Industry hones in on the three air-rifle companies and the spin-off .22-caliber rifle company that dominated the Plymouth landscape for years. William "Philip" Markham and his company, the Markham Air Rifle Company, first received...