KZ Benelli M4 Magazine Extension

(18 reviews) Write a Review
0.50 LBS
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Frequently bought together:


  • 2 Round Extension Tube
  • Made From Sold Bar Stock, Cold Finished 12L14 Steel
  • Black Oxide Finish
  • Easy-to-install
  • Does NOT Require Change Of Spring, Uses Factory Original
  • 100% USA Made

WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to You must be 18+ years old to shop and or purchase on our website and 21+ to purchase Ammunition/Firearms. Check local laws before ordering as you certify you are of legal age and satisfy all federal, state, and local legal/regulatory requirements. There are NO returns or exchanges on armor, firearms, ammunition, PPE equipment. Ammo ships UPS ground to the lower 48 states.
We reserve the right to fix any critical errors.

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Additional Information

Product ID:
Extension Tubes
Made In USA
Benelli M4
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18 Reviews

  • 5
    Mag extention

    Posted by Gary E Moore on 18th Oct 2021

    Excellent accessory for M4. Perfect fit and finish. Saves expense over a new full length tube. Highly recommended.

  • 5
    Benelli m4 magazine extension

    Posted by Skippie on 16th Oct 2021

    Good quality but only temporary until I get the factory 7 round tube

  • 5

    Posted by Wil on 11th Oct 2021

    Works as it should, blends well with the rest of the tube. Can not be beat.

  • 5
    Good product at reasonable price

    Posted by Lee on 8th Oct 2021

    This 2-round mag extension works well on my new Benelli M4. Good price too. The original spring works well too. I don't need to get another spring.

  • 5
    M4 Magazine Extension

    Posted by Randy on 6th Oct 2021

    Installed on Sulun Tac-12 , M4 clone. Easy install, worked great, looked good.

  • 5
    Amazing product

    Posted by Jacob on 6th Oct 2021

    Probably the best magazine extension tube for m4. Finish matches the existing magazine tube. 2 minutes installation. 100% recommended

  • 5
    Easy Install on TAC-12

    Posted by Chris on 17th Sep 2021

    I put this on a clone (SDS TAC-12) and the install was straightforward and everything fit correctly. A good upgrade if you are not willing to spend 2x to 4x for a full tube. Plus no heat gun required.

  • 5
    No difference between this and factory Benelli extension

    Posted by Nick on 10th Jul 2021

    Works like a charm! Had no problem fitting it to a SDS model tac 12 (m4 copy) just screw it on and run with it. Best part is it's hell alot cheaper than Benelli brand extension. 10/10

  • 5
    looks factory

    Posted by chainsaw on 26th Jun 2021

    It looks and works like it should. Looks like it came from the factory to me.

  • 5
    Benelli M4 extension

    Posted by Mark on 15th Jun 2021

    Easy install and great price! Thanks

  • 5
    Tube extension

    Posted by Michael Speakman on 20th Apr 2021

    I saw some mixed comments from people about botach but it's a great company and great product arrived quickly, solidly made,and easy to install.

  • 5

    Posted by George on 10th Feb 2021

    So far so good!!!!

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