Douglas Healey for The New York TimesUnless a rescue plan is worked out or a new buyer comes forward, the gun-manufacturing plant in New Haven, with about 200 employees, will close on March 31. Come spring, the Winchester rifle, immortalized as the gun that won the West and rode into the sunset with John Wayne, will be made in Portugal and Japan. The U.S. Repeating Arms Company, which has manufactured rifles and shotguns in New Haven since 1866, is set to shut its doors on March 31. About 200 people will lose their jobs, many having worked for decades...