Carlson’s Magazine Extension 12ga 10-Shot Rem 870/1100

This Carlson’s magazine extension is designed for 12 Gauge Remington shotguns and increases magazine capacity to 10 rounds. Constructed from blued solid steel, the threaded extension replaces the factory magazine cap and is supplied with a spring, base clamp with swivel stud, and a high-visibility follower. The assembly is intended for use on Remington 870, 1100, 11-87 and compatible Versa Max/V3 models. Easy-to-follow installation instructions are included.

Key Specifications

• The extension provides a capacity of 10 shots to the magazine.
• Designed for 12 Gauge shotguns.
• Constructed from blued solid steel for durability.
• Includes spring, base clamp with swivel stud, and a high-visibility follower.
• The unit uses a threaded tube that replaces the factory magazine cap.
• Fits Remington 870, 1100, 11-87, Versa Max, and V3 platforms as specified by the manufacturer.
• Provided product dimension string: 2.85 x 5.15 x 15.85 (as listed in source data).
• Finish listed as Blued in manufacturer data.

Built to add reliable capacity in applications such as competition, home protection, or duty use, this magazine extension offers a straightforward installation and durable construction. Its included hardware and high-visibility follower simplify setup and use, providing a practical upgrade for compatible Remington 12-gauge shotguns.