Direct From Manufacturer Nordic Components +6 MXT Shotgun Magazine Extension Tube Kit – 12 Gauge

Nordic Components +6 MXT Shotgun Magazine Extension Tube Kit – 12 Gauge

Six More Rounds. Zero Compromise. Trusted by Champions.

Upgrade your shotgun’s capacity with the Nordic Components +6 MXT Extension Tube Kit—a proven, lightweight, and rugged magazine tube extension built to compete at the highest level. Whether you’re running drills, dominating 3-Gun stages, or preparing for home defense, this kit delivers six extra rounds of 12-gauge power, secured by Nordic’s durable, anodized 6061 aluminum construction.

Easy to install and modular in design, the +6 kit includes a full-length spring, end cap, and precision-machined extension tube engineered to perform in even the most demanding environments. Compatible with most 12-gauge shotguns (with proper extension nut), this is the serious upgrade your scattergun needs.

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

Key Features

• +6 Capacity Increase
  Adds six 2.75" shells to your shotgun’s magazine—ideal for 3-Gun, tactical, or defensive use. (Use one size larger if loading 3" or 3.5" shells.)

• Lightweight & Durable 6061-T6 Aluminum
  Hardcoat anodized for strength and corrosion resistance without adding bulk to the front of your gun.

• Modular, Reversible Design
  Threaded on both ends for installation flexibility. Relief groove prevents barrel clamp travel and supports repeatable placement after maintenance.

• Complete Extension Kit
  Includes:

  • Extension Tube (+6 capacity)

  • Tube Cap

  • Full-length Magazine Spring

• Designed for Use with MXT Extension Tube Nut
  Nut sold separately. Required for installation—choose the correct nut for your shotgun’s brand and model.

Compatibility & Installation Notes

• Compatible with most 12-gauge shotguns (Remington, Mossberg, Benelli, Stoeger, and more) when paired with the correct MXT Extension Nut

• Most Remington shotguns require dimple removal in the factory mag tube for proper function

• Some models may require minor fitting or removal of spring/follower retention devices

For length and fitment guidance, refer to Nordic’s MXT Fit Guide

Product Specifications

Why Choose Nordic Components?

Trusted by top 3-Gun competitors and tactical professionals, Nordic Components leads the industry in modular shotgun extension technology. Engineered for real-world use and backed by a reputation for durability and fitment precision, this +6 MXT Extension Kit is the upgrade your 12-gauge has been waiting for.