The Remington Sportsman 58 is a significant vintage semi-automatic shotgun (1956-1963) known as Remington's first successful gas-operated model, featuring a unique "Dial-A-Matic" adjustable gas system in the magazine cap for different loads, serving as the direct predecessor to the iconic Model 1100 but requiring diligent cleaning and correct gas settings for reliable function, making it a collector's piece for its historical significance in American firearm