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KZ 2 Shot Magazine Extension Tube For Benelli M4 Shotguns

(48 reviews) Write a Review

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0.25 LBS
Frequently bought together:



  • Identical to the original, 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

Extension Tubes
Benelli M4
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48 Reviews

  • 5
    Great fit

    Exactly what you need if you have the m4 or 1014. Fits great

  • 5
    Quality and finish

    Was 1 inch to long for the Turkish M4 so I had to use a spacer to be able to tighten the nut at the end

  • 5
    Best Price on Any M4 Extension

    This is the best price I've seen on any M4 extension out there. The finish is great and blends well with the rest of the mag tube and barrel. The first time I put it on, I thought the threads at the end were too long because the barrel nut wouldn't go on fully, but after a few tries everything went together correctly so it probably just wasn't tightened down completely. Works perfectly now.

  • 5
    Nice extension but ..

    Did not drop in SDS S4. With the extension installed, I couldn't screw the cap down enough to lock the barrel so I had to cut a spacer out of some aluminum tubing. Works great now just be aware because if you aren't handy with tools, you will not be able to make it work.

  • 5
    Great Benelli M4 Mag Extension Option

    After making my M4 922(r) compliant, I installed a Carlson tube extension I got on sale. Unless the shells were on the short end of the tolerance for 2 2/3 shells, I could only load 6. Also, the Carlson needs to be removed to pull the barrel and gas system from the receiver. I purchased and installed the KZ extension and couldn't be happier. It has nice fit and finish. Best of all, I can get 7 in the tube with it. This is a great alternative to the extension Benelli sells.

  • 5
    Works well

    Works well on the Benelli M4. Had some minor finish issues, but still looks great and works as intended.

  • 5
    botach tube extension

    I put it on a sds s4 clone. it had to be fit to the tube as I'm sure the QC in Turkey isn't great. but the tube is great.

  • 4
    KZ Benelli M4 Mag. Ext.

    This item is a direct fit for the SDS Imports TAC-12. Installation was simple, can continue to use the factory spring with no issues. The color of this extension does not match the color of the weapon…minor con to me. I recommend this to anyone not wanting to spend Benelli money.

  • 4
    KZ Benelli M4 Magazine Extension

    This is a great addition to my Sulan TAC-12. I am still using the factory mag spring with no flaws or issues. The paint on this tube is a shade lighter than the weapon.

  • 5
    BCMGUNFIGHTER™ KAG - Black (M-LOK® Compatible*

    Excellent product, tested it yesterday and worked flawlessly with my Wolff spring. Botach 5 for 5! Quality product, fast shipping and excellent customer service. Thanks Again!

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