Nordic Components +5 MXT Shotgun Magazine Extension Tube Kit – 12 Gauge
Built for Capacity. Designed for Speed. Trusted in Competition.
Take your shotgun’s performance to the next level with the Nordic Components +5 MXT Magazine Extension Tube Kit (12ga)—an elite upgrade for shooters demanding higher round counts without compromising reliability or balance. Whether you’re stepping into 3-Gun, building a tactical defense setup, or preparing for an extended hunt, this +5 extension adds five extra rounds of 2.75" 12-gauge firepower to your existing magazine.
Machined from lightweight yet rugged 6061 aluminum and anodized for durability, the +5 MXT tube installs easily (with a required MXT extension nut) and offers a repeatable fit with every disassembly, thanks to its smart relief groove and precision threading.
⚠️ Requires Nordic MXT Extension Nut (sold separately) to attach to your shotgun’s magazine tube.
Key Features
+5 Capacity Increase
Expands your shotgun’s magazine by five rounds of 2.75" shells. Add serious staying power for competition, defense, or field use.Lightweight, Durable Construction
Made from anodized 6061-T6 aluminum—strong enough for hard use, light enough to keep your shotgun balanced.MXT Modular System
Compatible with all Nordic Components MXT extension nuts (sold separately). Threads on both ends allow the tube to be reversed for optimal fit and alignment.Anti-Slip Relief Groove
Prevents clamp migration under recoil and ensures consistent, repeatable placement—even after repeated disassembly.Full-Length Spring & Tube Cap Included
Comes ready for install with a precision-wound spring and durable end cap. (+1 models feature an integrated cap design.)Universal Fitment
Works with many 12-gauge shotguns, including Remington, Mossberg, Benelli, Winchester, Beretta, and others with compatible mag tube threading.
Installation Notes
⚠️ MXT Extension Nut Required – This kit will not install without a matching MXT nut for your shotgun model.
⚠️ Receiver Mods May Be Necessary – Most shotguns (especially Remington) with factory magazine dimples will require internal smoothing or dimple removal. Spring retainers/followers must be removed for proper function.
Product Specifications
| Feature | Specification |
|---|---|
| Product Name | Nordic Components +5 MXT Tube Kit – 12ga |
| Capacity Increase | +5 Rounds (2.75") |
| Material | 6061-T6 Aluminum |
| Finish | Black Hardcoat Anodized |
| Included Components | Extension tube, tube cap, full-length spring |
| Thread Compatibility | MXT modular thread pattern |
| Compatibility | 12 Gauge Shotguns w/ MXT nut |
| Relief Groove | Yes (adjustable via reversed installation) |
Perfect For:
3-Gun and IPSC/USPSA shotgun competition
Tactical defense and patrol shotguns
Waterfowl and predator hunters needing extra capacity
Remington 870/1100/Versa Max, Mossberg 930, Benelli M2/M4 builds
Shooters looking for lightweight, modular upgrades
Why Choose Nordic Components?
Because they build extensions that win matches. Trusted by competitive shooters and tactical operators, Nordic’s MXT line is the gold standard in modular shotgun magazine extensions. With tool-free takedown, extreme durability, and precision machining, these systems are ready for any stage, any range, any mission.
WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.
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