Both shotguns are based on the iconic Winchester 1300, which is based on the Model 1200. Winchester Model 1200 was designed in 1964. The United States Army had a small number of these shotguns. They had special accessories: ventilated handguard, sling swivels, and a bayonet lug.
The Model 1200 was replaced by the Winchester 1300 in 1983, and it had minor improvements. The Manufacturing of the Model 1300 ended in 2006 with the bankruptcy of its manufacturer, the U.S. Repeating Arms Company. There were about 1,900,000 shotguns built.
Winchester SXP (Super X Pump) shotguns are currently made in Turkey, while the Savage Stevens 320 Security is made in China.