GG&G Remington 870 3 Shot Mag Ext

The GG&G Remington 870 3 Shot Mag Ext is a purpose-built magazine tube extension designed for 12-gauge Remington 870 pump-action shotguns. This accessory addresses the operational limitation of standard 870 tube capacity, allowing tactical operators, law enforcement professionals, and civilian shooters to carry three additional rounds of 12-gauge ammunition, bringing the total capacity to 3+1 (3 in the extension plus 1 in the chamber).

GG&G engineered this magazine extension for easy installation as a threaded tube extension—no permanent modification to your receiver or barrel is required. The extension threads directly onto the existing magazine tube and maintains the same diameter and profile as the factory tube, ensuring compatibility with standard 870 foregrips, handguards, and slings. Constructed from steel, it resists corrosion and handles the cyclic forces of repeated shotgun operation.

Law enforcement entry teams and military personnel benefit most from this extension when deploying less-lethal rounds, breaching rounds, or buckshot in rapid-succession engagements. Installation requires only basic shotgun field-stripping knowledge and takes minutes without special tools, making it an essential addition for high-volume training environments.