Nordic Components +3 MXT Shotgun Magazine Extension Tube Kit – 12 Gauge
Not Yet Rated | Write the First Review SKU: 222-NOR-MXT-TBS-12-3K
UPC: 816696000000

Nordic Components +3 MXT Shotgun Magazine Extension Tube Kit – 12 Gauge

Increase Capacity. Enhance Performance. Field-Proven Durability.

Boost your shotgun’s firepower with the Nordic Components +3 MXT Magazine Extension Tube Kit, designed to add three extra rounds to your 12-gauge platform. Whether you're training for competition, preparing for duty, or upgrading your home defense setup, this rugged, precision-machined extension kit provides a lightweight, modular, and reliable solution to extend your magazine capacity.

Crafted from anodized 6061 aluminum and backed by Nordic’s reputation for precision engineering, this +3 extension installs easily (with the required MXT extension nut, sold separately) and includes a full-length magazine spring and end cap for complete functionality right out of the box.

⚠️ Requires Nordic MXT Extension Nut (sold separately) to attach to your shotgun’s magazine tube.

Key Features

• +3 Round Capacity Increase
  Instantly adds three rounds of 2.75" 12-gauge shells to your shotgun—ideal for competition, tactical applications, or extended field use.

• Durable, Lightweight Construction
  Built from hard-anodized 6061 aluminum, the extension adds strength without adding unnecessary weight.

• Anti-Slip Relief Groove
  Prevents barrel clamp movement during recoil and allows repeatable positioning after cleaning or disassembly. Reversible design offers placement flexibility.

• Full-Length Spring & Cap Included
  Everything you need to upgrade your magazine tube is included—no need to buy separate springs or hardware.

• Reversible Threading
  Matching threads on both ends allow the tube to be reversed for optimal fitment and clamp alignment.

• Modular & Expandable
  Part of the MXT system—compatible with a wide range of tube lengths and nuts for future customizations.

Compatibility Notes

• ✅ Requires MXT Extension Tube Nut (sold separately) to attach to your shotgun.

• ✅ Designed for 12-gauge shotguns using 2.75" shells.

• ⚠️ Shotguns with dimples, spring retention clips, or staked followers (such as most Remington 870/1100/11-87) may require light modification for full functionality.

What’s Included

• MXT +3 Extension Tube

• Tube End Cap

• Full-Length Magazine Spring

Note: +1 kits have integrated caps and may vary slightly in configuration.

Product Specifications

Why Choose Nordic Components?

Trusted by 3-Gun competitors, law enforcement, and serious shooters, Nordic Components is a leading name in shotgun performance parts. Their MXT extension system is known for modularity, strength, and reliable performance when it counts. The +3 MXT kit delivers serious firepower in a package that’s light, strong, and designed to endure.