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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
    Botach mag extension

    Great price, easy to install and fast shipping A+

  • 3
    Works but not black

    Works for those extra two rounds. Color is closer to gun metal gray on the one I received, not black like description.

  • 5
    Fits great

    Fits perfect on a MAC 1014. Color is a tiny more gray than the deep black of the gun but pretty close. Can still remove the barrel with this extension in place. Fits all 7 shells like a charm. Probably the best deal out there for a +2. Stock spring works fine with this also

  • 5
    Shipped - Cerakote - Installed - Nice!

    Item shipped quickly and equals the quality of the Benelli M4 OEM extension. Black finish accepted OD Green Cerakote and looks flawless on the OD Green Benelli M4. $59 price point CRUSHES all other offerings.

  • 5
    Great magazine tube extension

    This fit my Benelli M4 with no issues. Screwed right on and the color match to the rest of the tube is perfect.

  • 5
    Good quality

    Won't fit panzer or gforce m4 clone without getting a benelli commercial mag tube. For some reason panzer and the g force clone use different length tubes.

  • 5
    KZ 2 shot extension

    Fit purfect on Black Aces M4 shotgun

  • 5
    Best for m4 clones

    So I have one of the black aces s4 pro and finding a extension was proving difficult I tried all the others including the Carson and none worked until I found this bad boy it is a exact thread match and was super easy to install highly recommend the product and this company to

  • 1
    2 round extension

    This extension does NOT work on the Panzer m4. The extension is 5/8s of an inch to long.

  • 4
    KZ benelli m4 tube ext

    It works and fits on the panzer m4 for +2 but requires a spacer. I measured OD and ID, order 6 inches of appropriate Alum from Mcmaster and cut to fit. You lose the spring detend but has not come loose from hand tight after many boxes of buck and slugs. Would buy again or recomend.

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