The Nordic +4 MXT Magazine Extension Kit (brand part no. MXT-TBS-12-4K) adds four extra rounds of capacity to a 12-gauge shotgun’s existing magazine tube. This tube kit is used in conjunction with Nordic’s separately-sold 12-gauge extension tube nut, which replaces the factory magazine cap and is required to complete the installation. Finished in black, it is part of Nordic’s MXT extension tube system.

Key Specifications

• Adds four rounds of extra magazine capacity.
• Built for 12-gauge shotguns.
• Requires Nordic’s 12-gauge extension tube nut, sold separately.
• Part of Nordic’s MXT extension tube system.
• Finished in black.

Frequently Asked Questions

Does this include the extension tube nut? No, this kit requires Nordic’s 12-gauge extension tube nut, which is sold separately.

How much capacity does this add? It adds four extra rounds to a 12-gauge shotgun’s magazine.

Buy the Nordic +4 MXT Magazine Extension Kit

Four more rounds on tap is a meaningful upgrade for a defensive or competition 12-gauge, and Nordic’s MXT kit is a straightforward way to get there. Browse more shotgun magazines from Nordic Components and order it from our Lubbock, Texas gun shop for fast, insured shipping.