The tubular magazine extension located beneath the barrel of a Remington 870 shotgun, enabling the attachment of the slide-action mechanism’s forend, is a critical component. This component houses the action bars and spring that connect the forend to the bolt, facilitating the loading and ejection of shells. Variations in length and material exist to accommodate different ammunition capacities and user preferences.
This assembly directly impacts the weapon’s functionality and handling. A properly functioning magazine extension ensures reliable feeding and cycling of ammunition, contributing to the shotgun’s effectiveness. Historically, modifications and enhancements to this part have reflected evolving needs for hunting, sport shooting, and tactical applications. The choice of material, for instance, affects durability and weight, factors influencing user experience.