KZ 2 Shot Magazine Extension Tube For Benelli M4 Shotguns

(43 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

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Additional Information

Extension Tubes
Benelli M4
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43 Reviews

  • 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.

  • 5
    Magazine Extension

    Perfect Fit

  • 5
    Perfect on Black Aces S4

    Fits perfectly on clone black aces s4 from palmetto state. can still get everything off without removing. Love the extra capacity

  • 4
    Plus 2

    Good quality , does what it's intended for ! Easy install , maybe five minutes! Fits well on the Aska m4 ! Gave four stars due to finish/color could be better Overall, good product for the coin !

  • 5
    KZ Benelli M2 2 shot extension

    Excellent product that works exactly as it should and is priced accordingly. Well worth waiting for if not in stock.

  • 3
    Extended magazine tube

    I put this particular extension on my Panzer M4 clone. Easy install. Color a little light from gun and fake one that I took off of gun. Only issue was a 5/8 or so gap between magazine tube and nut when fully tightened. I had a custom collar made to fill gap. The collar added some weight to front of gun, helped alot on recoil reduction. Balance of weapon is different than stock form. Overall I am very pleased.

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