Carlson’s 12 Gauge Magazine Extension – Remington 870/1100/11-87/V3

The Carlson's 04521 magazine extension is a threaded magazine tube replacement designed for compatible Remington 12-gauge shotguns. Constructed of blued solid steel, it increases magazine capacity and installs in place of the factory magazine cap. The kit ships with a spring and a base clamp that includes a swivel stud; a high-visibility follower is included with some extensions while other configurations require the factory follower. Easy-to-follow installation instructions are provided.

Key Specifications

• The caliber is 12 Gauge.
• Compatible with Remington 870, 1100, 11-87, Versa Max, and V3.
• The magazine capacity is 12-shot.
• Constructed of blued solid steel.
• The kit includes a spring and base clamp with swivel stud.
• The design uses a threaded tube that replaces the magazine cap.
• Works with quick detachable swivels (swivel not included).
• The package contains easy-to-follow installation instructions.

Durable and straightforward, this Carlson's magazine extension offers a practical way to expand magazine capacity on compatible Remington 12-gauge shotguns. Its blued steel construction and included hardware provide a reliable, utilitarian upgrade suitable for competition and other lawful shooting activities where increased capacity is desired.