The Remington Model 870 Wingmaster is an American pump-action shotgun introduced in 1950. The Remington Model 870 is produced in various calibres of 12-, 20-, 28- or 40-gauge and various barrel lengths ranging from 18-inches to 30-inches. The Remington Model 870 has a 5-round tubular magazine as standard, which can be extended to 8-rounds. Research Remington Model 870