Wilson Combat Vertical Extension Tube 12 Gauge +2 Rounds

The Wilson Combat Vertical Extension Tube is a purpose-built magazine extension for 12 gauge shotguns that adds two rounds to your tube capacity. Built to the exacting standards that earned it selection by federal law enforcement agencies, this extension is engineered from robust materials designed to withstand hard use in the field or on the range. It arrives fully assembled and ready to install, eliminating guesswork and saving you setup time.

This extension ships with an extra-power magazine spring tuned for reliable feeding and a high-visibility neon green follower so you can instantly see when your magazine runs dry. The included sling mount allows vertical attachment to the bottom of your shotgun's magazine tube, giving you a secure point for tactical slings or quick-detach hardware. A wave washer is also included to ensure proper fit and function.

The extension fits Remington M870, 1100, and 1187 shotguns in 12 gauge and features a Parkerized finish that resists corrosion. Note that the follower is not grooved for newer 870 magazine tubes; if needed, the magazine tube detent can be filed down for proper follower seating. Whether you're running a home-defense setup, competing in tactical shotgun matches, or building a versatile hunting gun, this extension gives you the extra capacity and reliability you'd expect from Wilson Combat's professional-grade engineering.

Key Features

• Adds two rounds to magazine capacity on compatible 12 gauge shotguns
• Includes extra-power magazine spring for improved feeding reliability
• High-visibility neon green follower for quick magazine status confirmation
• Vertical sling mount attachment point on bottom of tube
• Parkerized finish for corrosion resistance
• Ships ready to install with all necessary components
• Built to federal law enforcement durability standards

Specifications

Frequently Asked Questions

Will this fit my Remington 870?

Yes, this extension is designed for Remington M870, 1100, and 1187 shotguns in 12 gauge.

What comes in the box?

The extension ships fully assembled and ready to install. It includes the tube itself, an extra-power magazine spring, a neon green high-visibility follower, a wave washer, and a vertical sling mount for bottom attachment.

Does the follower work with newer 870 magazine tubes?

The follower is not grooved to fit newer 870 magazine tubes. However, you can file down the magazine tube detent to achieve proper follower seating if needed.

What is this extension rated for?

This extension was selected for use by the U.S. Secret Service and U.S. Border Patrol, reflecting its durability and reliability under demanding conditions.