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Questions & Answers
Need an extension nut for the Girsan MC312 Semi-auto shotgun 28” barrel. I understand this gun is a Benelli M-2 clone made in Turkey for EAA. Thnx Expert Answer

Unfortunately it looks like the Benelli M2 nut will not fit the Girsan MC312. For compatibility I would suggest contacting Nordic Components directly at 952-442-8900

by Robert G., Gear Expert, September 25, 2019
Can I use this nut (for my M2) with an extension tube from a brand other than Nordic? Expert Answer

You would need to contact Nordic Components to confirm compatibility of the Nordic Components Shotgun Extension Tube Nut with the extension tube you are using.

by Hunter, Gear Expert, June 12, 2023
Customer Reviews
Helpful Positive Review
Works absolutely great. But, keep in mind, that it is sold separately from the actual magazine extension and spring. Nordic Components are highly quality and look hear when attached to their respective guns. Highly recommended.
1/1 found this helpful
Helpful Positive Review
Quality product by Paul, Verified Owner, January 29, 2018
I ordered the wrong nut Customer sevice was one of the best ive experienced...Sent out the right one super fast..great company that sells top quality products. Wish I could remember the lady thay helped me ,she was awesome..Ill be back for sure..Tha...
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1/1 found this helpful
Helpful Positive Review
Would you like to screw by zenmonger, March 8, 2018
your Nordic mag extension tube onto your shotgun? This will allow you to do that. This nut is aestheically pleasing, ergonomically designed, finished tastefully in matte black tacticool fashion. Your friends will be jealous of you, you with your fanc...
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7/11 found this helpful
Helpful Positive Review
I can confirm this product fits the Panzer M2, even though it's specifications do not mention the M2. The finish was flawless, and the extension tube sold separately was easy to assemble and install on the shotgun.
2/2 found this helpful
Helpful Positive Review
Solid part by kurisu, Verified Owner, February 9, 2020
This with Nordic magazine tube is a solid add on to my supernova 12 gauge. Absolutely glad that I went with this brand for the quality and fitment is perfect. If your looking for a good solid quality add on this is the one to go with.
1/1 found this helpful
Most Recent Reviews
Charles Daly 301 tactical by William Yeager, Verified Owner, May 18, 2025
Optics planet was awesome helping me find the right fit for my shotgun. Works perfectly
Read All 13 Reviews
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Product Info for Nordic Components Shotgun Extension Tube Nut, Benelli Nova/SuperNova, Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme, CZ 712/912, Weatherby

Use the Nordic Components Shotgun Extension Tube Nut to install the MXT Extension Tube Kit onto your firearm. These Shotgun Magazine Extensions from Nordic Components replace your factory magazine cap to allow for the addition of an extension tube. Please note that in order to install this Nordic Components 12ga Shotgun Extension Nut, you'll need to smooth or remove mag dimples or spring retainers for a proper fit. Get the Nordic Components Shotgun MXT Extension Nut to ensure your extension tube kit is secured and ready for action.image

Specifications for Nordic Components Shotgun Extension Tube Nut, Benelli Nova/SuperNova, Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme, CZ 712/912, Weatherby:

Manufacturer: Nordic Components
Color: Matte Black
Magazine Capacity: 0 Round
Condition: New

Features of Nordic Components Shotgun Extension Tube Nut:

  • Required for installation of the extension tube kit
  • Replaces the factory magazine cap
  • Any magazine dimples or spring retaining devices will need to be smoothed or removed to allow proper function

Package Contents:

  • Nordic Components Shotgun Extension Tube Nut

Nordic Components Shotgun Extension Tube Nut, Benelli Nova/SuperNova, Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme, CZ 712/912, Weatherby Orderable Models

List of Orderable Models

  • Nordic Components Shotgun Extension Tube Nut, Benelli Nova/SuperNova, Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme, CZ 712/912, Weatherby SA-08, Matte Black, 12ga, NUT-BR-12-00 , MPN: NUT-BR-12-00 , UPC: 816696020808 , Code: 2OX-MZX-NCSG-M3000-12-00-1-0RD
  • Nordic Components Shotgun Extension Tube Nut, Benelli M1/M2/SBE/SBE2, does not fit Nova/Super Nova, Matte Black, 12ga, NUT-BN-12-00 , MPN: NUT-BN-12-00 , UPC: 816696020785 , Code: 2OX-MZX-NCSG-MB-12-00-1-0RD
  • Nordic Components Shotgun Extension Tube Nut, Mossberg 590/835/930/935, Matte Black, 12ga, NUT-MB-12-00 , MPN: NUT-MB-12-00 , UPC: 816696020822 , Code: 2OX-MZX-NCSG-BP-12-00-1-0RD
  • Nordic Components Shotgun Extension Tube Nut, Benelli Nova, CZ 720, Weatherby SA-08, Mossberg SA-20, Matte Black, 20ga, NUT-BR-20-00 , MPN: NUT-BR-20-00 , UPC: 816696020938 , Code: 2OX-MZX-NCSG-BR-20-00-0RD
  • Nordic Components Shotgun Extension Tube Nut, Remington Versa Max/1100/11-87/870/Cti-105, Also fits ATI SX2 by cutting threads down/shim, Matte Black, 12ga, NUT-RM-12-00 , MPN: NUT-RM-12-00 , UPC: 816696020846 , Code: 2OX-MZX-NCSG-RM-12-00-1-0RD
  • Nordic Components Shotgun Extension Tube Nut, Stoeger M3000/M3500/M3K Matte Black, 12ga, NUT-M3000-12-00 , MPN: NUT-M3000-12-00 , UPC: 816696020815 , Code: 2OX-MZX-NCSG-M3000-12-000-1-0RD
  • Nordic Components Shotgun Extension Tube Nut, Stoeger Model 2000, Franchi I-12/Affinity/Intensity, Matte Black, 12ga, NCNUT-ST-12-00 , MPN: NCNUT-ST-12-00 , UPC: 816696020860 , Code: 2OX-MZX-NCSG-ST-12-00-1-0RD

Nordic Components Shotgun Extension Tube Nut, Benelli Nova/SuperNova, Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme, CZ 712/912, Weatherby Unavailable & Discontinued Models

List of Unorderable Models

  • Nordic Components Shotgun Extension Tube Nut, Browning Gold/Silver, Winchester SX3, Matte Black, 20ga, NUT-BG-20-00 , MPN: NUT-BG-20-00 , UPC: 816696020921 , Code: 2OX-MZX-NCSG-BG-20-00
  • USED, Nordic Components Shotgun Extension Tube Nut, Benelli M1/M2/SBE/SBE2, does not fit Nova/Super Nova, Matte Black, 12ga, NUT-BN-12-00 , MPN: NUT-BN-12-00-EDEMO , Code: 2OX-MZX-NCSG-MB-12-00-1-0RD-EDEMO-RE-B
  • USED Nordic Components Shotgun Extension Tube Nut, Benelli Nova, CZ 720, Weatherby SA-08, Mossberg SA-20, Matte Black, 20ga, NUT-BR-20-00, EDEMO1, Used, Condition Like New, Inspect and Rebox , MPN: NUT-BR-20-00-EDEMO1 , Code: 2OX-MZX-NCSG-BR-20-00-0RD-EDEMO-RE-A
  • Nordic Components Shotgun Extension Tube Nut, Winchester 120/1200/1300, Stevens 320, FN P-12, Matte Black, 12ga, NCNUT-WIN-120 , MPN: NCNUT-WIN-120 , UPC: 816696020884 , Code: 2OX-MZX-NCSG-WIN-120
  • Nordic Components Shotgun Extension Tube Nut, Winchester SX2/SX3, FN SLP/SLP MK1, Browning Gold/Silver, Matte Black, 12ga, NCNUT-SX-12-00 , MPN: NCNUT-SX-12-00 , UPC: 816696020877 , Code: 2OX-MZX-NCSG-SX-12-00-1-0RD
  • USED, Nordic Components Shotgun Extension Tube Nut, Benelli Nova/SuperNova, Beretta 1301/391 Xtrema/391 Xtrema II/Tx4/A400/A400 Xtreme, CZ 712/912, Weatherby SA-08, Matte Black, 12ga, NUT-BR-12-00 , MPN: NUT-BR-12-00-EDEMO , Code: 2OX-MZX-NCSG-M3000-12-00-1-0RD-EDEMO-RE-B
  • Nordic Components Shotgun Extension Tube Nut, Benelli M1/M2, Matte Black, 20ga, NUT-BN-20-00 , MPN: NUT-BN-20-00 , UPC: 816696020914 , Code: 2OX-MZX-NCSG-BN-20-00-0RD
  • Nordic Components Shotgun Extension Tube Nut, Remington 1100/11-87/870, Matte Black, 20ga, NUT-RM-20-00 , MPN: NUT-RM-20-00 , UPC: 816696020945 , Code: 2OX-MZX-NCSG-RM-20-00-0RD
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