Description
If you're planning to run a Nordic Components MXT extension tube on a Benelli autoloader, this is the piece that makes it all connect. The nut threads onto your factory magazine in place of the stock cap and gives the MXT tube a solid, repeatable mounting point. It's a small part, but nothing on the extension works without it, so consider it the foundation of the whole build.
Nordic machines this nut from billet aluminum and finishes it in a matte black anodized coating, so it matches the look of the MXT tubes and holds up against the elements. It's a purpose-built component rather than a universal fit, and that shows in how cleanly it mates to the tube.
What the Benelli 12GA Extension Nut Fits
This is the BN-model nut, built for the Benelli M1, M2, and Super Black Eagle family including the SBE, SBE2, and SBE3, plus a handful of Breda autos like the B12i, B12iS, Grizzly, and 930i, along with the Weatherby 18i. Worth calling out up front: it does not fit the Benelli Nova or Super Nova. Those pump guns use a different thread pattern, so if that's what you're running you'll want the other nut.
Getting the MXT Nut Installed Right
Installation is straightforward and most folks knock it out with basic hand tools in ten to fifteen minutes. The one thing to check is your factory magazine tube. If it has dimples or a spring retaining device inside, those need to be smoothed or removed so the extension and follower can travel freely. Skip that step and the gun won't cycle right, so take the time to do it. Keep in mind this nut is the connector only. You'll still need the matching MXT extension tube kit, which ships with the tube, cap, and full-length spring to complete the setup and add your rounds.
Key Specifications
- Manufacturer: Nordic Components
- Manufacturer Part Number: NUT-BN-12-00
- UPC: 816696020785
- Model: Benelli
- Gauge: 12 Gauge
- Product Type: Shotgun Magazine Tube Component
- Material: Billet Aluminum
- Finish: Matte Black Anodized
- Color: Black
- Fits: Benelli M1, M2, SBE, SBE2, SBE3 (not Nova/Super Nova)
- Country of Origin: Made in USA
What’s Included
- Nordic Components Benelli 12GA MXT extension nut (1)
Frequently Asked Questions
Does the Benelli 12GA extension nut come with the extension tube?
No, this listing is for the nut only. It's the connector that replaces your factory magazine cap and lets you mount the extension. You'll need to add the matching Nordic Components MXT 12ga extension tube kit, which includes the tube, cap, and full-length spring, to actually increase your capacity.
Which shotguns does this MXT nut fit?
It's designed for the Benelli M1, M2, and the Super Black Eagle line including the SBE, SBE2, and SBE3, plus certain Breda autos and the Weatherby 18i. It will not fit the Benelli Nova or Super Nova, which use a different thread pattern. Nordic also notes it may work on other shotguns sharing the same factory thread pattern, though those can require some fitting.
Is installation of the extension nut difficult?
Not at all. Most people install it with basic hand tools in about ten to fifteen minutes. The main thing to watch for is any dimple or spring retaining device inside your factory magazine tube, which needs to be smoothed or removed so the follower and spring can move freely.
What is the Benelli 12GA extension nut made of?
It's machined from billet aluminum and finished in a matte black anodized coating. That keeps it lightweight and corrosion resistant while matching the look of the MXT extension tubes. It's made in the USA.







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