SDS Imports(R) magazine extension is designed for compatible MAC-2 shotguns. The extension increases magazine capacity by four rounds and features a black finish. It provides an extended-capacity configuration for compatible MAC-2 12 Gauge shotgun applications.Key Features Designed for compatible MAC-2 shotguns Designed for 12 Gauge applications Adds 4 rounds of magazine capacity Extended magazine tube configuration Black finishSDS Imports(R) provides firearms components and accessories for sporting and recreational applications. The company offers purpose-built products designed for compatibility with supported firearm platforms. SDS Imports products emphasize functional design durable construction and practical performance.