What is the fixed choke on a Remington 870?

The fixed choke on a Remington 870 refers to the constriction of the shotgun's barrel that determines the spread of the shot as it exits. Unlike interchangeable chokes, a fixed choke is permanently set at a specific constriction, such as improved cylinder, modified, or full. This design influences the shotgun's effective range and pattern density, making it suited for particular types of shooting, such as hunting or clay shooting. Fixed chokes are typically found on older models or specific versions of the Remington 870.