Remington has made gas-operated shotguns since the 1950s. Their very first one manufactured was the Model 58 semi-automatic shotgun. This shotgun line enjoyed a fair amount of success between 1956 and 1963. But then, they built a better gas-operated shotgun which reduced recoil a lot more. This model was called the Remington Model 1100. It was first introduced in 1963 and has been manufactured ever since. The three most common gauges manufactured for this shotgun are the 12-gauge, 28-gauge, .410 bore and 20-gauge.
One of the simplest ways to improve your shotgun’s performance is to change a standard MIM (Metal injection molded) extractor with non-MIM (solid steel) extractor. Steel extractors are used on the Remington 870 Police shotguns because they are more durable and allow heavy use of a shotgun.
An extractor is a part found in most firearms. It removes the spent cases from the ammunition that gets fired after you pull the trigger. With Remington 870/1100 extractors, you can use a non-MIM or a MIM extractor for the shotgun. MIM stands for metal injection molding. Newer Remington 870/1100 shotguns use MIM extractor. But the good news is that you can replace the MIM extractor with a Non-MIM extractor.