MXT Shotgun Magazine Extension Tube Kit, 12ga.

(22 customer reviews)



Visit this page for information to ensure you order a complete kit assembly.

SKU: N/A Categories: ,


MXT shotgun magazine extension tube kit for increasing magazine capacity. Used in conjunction with the MXT extension tube nut, this tube kit will add the stated number of rounds (+1 to +9) to your existing magazine capacity. All capacities are measured using 2.75″ star-crimped shells; for use with 3″ or 3.5″, increase your selection by one or two rounds.

Kits ship with extension tube, tube cap, and full-length spring (+1 tubes have an integral cap and will not include a separate cap). To determine the length of the extension in relation to your shotgun, visit the MXT Fit Guide.


  • Anodized 6061 aluminum for strength and weight
  • Available in a variety of lengths providing capacity increases of +1 to +9
  • Features relief groove to eliminate barrel clamp travel and ensure repeatable placement after disassembly (+2 through +9 extensions only)
  • Relief groove located off-center to allow location adjustment by reversing the tube
  • Machined with matching thread pitch on both ends to allow reversing the tube

Note: May require modification of shotgun for installation and/or proper function. Any spring/follower retention devices will have to be removed to allow extension to function.Most Remington shotguns will have dimples in the factory magazine that will need to be removed.

[row col_bg=”rgb(255, 255, 255)” custom_width=”71px” h_align=”center”]

[col span=”9″ span__sm=”12″]

Shoot a 20 gauge?

The MXT extension kit is specific to the 12 gauge. Check out our 20 gauge extension kits for compatible tubes.



Additional information

Adds to your factory magazine capacity

, , , , , , , , , , ,

22 reviews for MXT Shotgun Magazine Extension Tube Kit, 12ga.

  1. Luis Martinez (verified owner)

    Excellent fit and finish.

  2. Jeff Davidson

    Best extention on the market smooth follow up shots with no jamming ..good job

  3. Wes

    Fits perfect with no issues thanks for having such great products

  4. Brandon marsh

    Added the +9 to my 1187 and it’s all that I could have hoped for!! Amazing construction great job keep up the amazing work!!

  5. Brent Splinter (verified owner)

    I’ve have the +9 on my SBE2 and let me tell you I couldn’t ask for a better / trouble free product …. My brothers are getting there’s for the up and coming spring snow season !

  6. Matthew Koopikka

    The standard that all other magazine tubes are judged against.

  7. Eric B

    Purchased the +7 for a Remington 870 Wingmaster 2 3/4″ and it worked perfectly. Very easy to install, just removed old cap and spring, inserted coupler, new spring, and cap. As recommended for the 870, I purchased the bracket which secures the tube to the barrel. As per the instructions, I trimmed off several inches of the spring until I was able to load 11 rounds into the tube. Worked great for Three Gun Event.

  8. Elpidio Simon (verified owner)

    Exceptional quality.the +3 actually added +4 on my Benelli Nova using 2 3/4 shells. Would definitely recommend and buy again.

  9. Ashli Koenig (verified owner)

    I bought the +7 for my SBE II and it works fantastic. It makes shooting skeet so much more fun now that i don’t have to reload after every double. I ordered this on a Thursday morning and received it Saturday. When i first put the tube on i did not do any modification to the spring and was able to hold 9 in the tube and 1 in the camber. I put 325 rounds with out a single failure. I then cut the spring to where only 12in stuck out and was able to then hold 10 in the tube and 1 one the chamber. Have put 175 rounds since cut the spring and not a single failure. This is a great product and i will be buying it again for my other shotguns. Thanks Nordic Components for the great service, fast shipping and an unbelivabley great product at a great price.

  10. Aaron Gifford

    You wont find a better magtube extension anywhere! I have magtubes for multiple shotguns… NC is the pinnacle of firearm accessories & magtube extensions! GET THE WHOLE KIT! I have legacy (retired) extensions but MXT on the way for my newest addition! Enjoy folks!!!

  11. Paul Bellamy

    Got the +5 for my Beretta 1301 Competition through Brownells. It went on easily and works flawlessly even with the stock magazine follower still in place.

  12. Edward Orozco (verified owner)

    Great product and service. Added the +4 to my Stoeger M2000 Defense (Pistol Grip). Had to remove the small tit inside the existing mag tube. Used my dremel tool and slowly ground it smooth. Then eased the “c” ring out of the tube working it carefully with a small screw driver. The existing spring extended 8″ beyond the tube. Installed the extension and left 12″ of spring extending out. Put it together and ran 25 #4 through it without one hiccup. The Defense has an 18.5 barrel and the new tube extends 3″ beyond the barrel. No issues at all.

  13. Jim Kelley (verified owner)

    Purchased +9 for my new Benelli SBE3 holds 12 3 inch 13 2 3/4 excellent quality, fit and finish. A little over priced in my opinion.

  14. Jeff Yates (verified owner)

    Fits perfect. Best quality on the market. Thanks for a great product !!!

  15. Anthony Amburgey (verified owner)

    Put a whole new tube on my 930 jm pro to get more capacity and added the plus one mxt cap and it seems to work as advertised. Was 8+1 now 10+1

  16. Anthony Amburgey (verified owner)

    Great product as advertised went from 8+1 to 10+1

  17. Phillip (verified owner)

    I added this to my Benelli M2 I could be more pleased with the fit and finish it looks and functions like it came from Benelli.

  18. We Chia (verified owner)

    Got a +9 round tube for my M3500 Stoeger, it’s legit, no problem at all. Feed just right, if anyone is planning to buy, just leave an extra room for the spring. You have to cut the spring, but leave some extra inches for the spring.

  19. jberning (verified owner)

    I ordered the +3 MXT Shotgun Extension Kit for my Benelli M2 Tactical. I installed it exactly like the instructions stated, including cutting the magazine spring. Took about 10 minutes. Now I have 7 in the the tube. The extension works perfectly, looks fantastic and to top it off, Nordic Components sent me a 15% off code! I just ordered a barrel clamp with a sling attachment. I’m happy as a clam.

  20. Dave Mac (verified owner)

    I just got the “plus one” for my Remington 870 Tac-14. I now have a 5 plus 1 and it works great. I removed the dimples in the magizine tube and everything is working flawlessly. Love this product!

  21. jaimem (verified owner)

    Easy to install and works perfectly, i like easy

  22. C. Martin

    Bought this for my Benelli M2 Tactical (+3BK) and it looks and works great. I had less luck the the follower from Nordic, but I left a review about it under that product page.

Add a review

Your email address will not be published. Required fields are marked *