The Nordic Components MXT +3 Magazine Extension Kit (brand part number MXT-TBS-12-3K) adds three rounds of additional capacity to a 12 gauge shotgun’s factory magazine tube. Nordic Components builds the MXT line for shooters who want extra rounds on tap for competition, home defense, or duty use without switching to an entirely different magazine tube. This tube kit is used in conjunction with a separate 12 gauge extension tube nut, which is not included and must be on hand or purchased separately to complete the installation. It is a straightforward capacity upgrade for 12 gauge shotgun owners who already have, or plan to add, a compatible extension tube nut.

Key Specifications

• Adds 3 rounds of additional magazine capacity.
• Built for 12 gauge shotguns.
• Part of Nordic Components’ MXT magazine extension line.
• Requires a separate 12 gauge extension tube nut, which is not included in this kit.

Frequently Asked Questions

How many extra rounds does this kit add? Three rounds of additional 12 gauge capacity.

Does this kit include the extension tube nut? No, a separate 12 gauge extension tube nut is required and is not included.

What gauge is this kit built for? 12 gauge shotguns.

Buy the Nordic MXT +3 Magazine Extension Kit

Order the Nordic Components MXT +3 kit from our Lubbock, Texas gun shop for fast, insured shipping. Browse more Nordic Components shotgun magazines for your build.