Benelli M4 Magazine Extension

(98 customer reviews)


Shipping to USA, Canada

Frequently Bought With:
This item: Benelli M4 Magazine Extension
Benelli M4 Magazine Cap Titanium

Benelli M4 Magazine Extension

Rx Arms Solutions Benelli M4 Magazine Extension tube increases the Benelli M4 Magazine Capacity +2 for USA Residents. For Canadian Residents; these tubes are NOT plugged for Canadian legal capacity, and need to be plugged prior to installation to comply with Canadian Law.

CNC Precision machined from solid 4140 Hardened Steel, boasting a yield strength of 130,000 psi, double that of mild cold rolled steel. Ships to USA and Canada. The Rx Arms Benelli M4 Magazine Extension is for those M4 owners who do not wish to perform the tasks needed to swap out their OEM Benelli M4 Magazine full tube, but still desire to increase to full capacity.  No replacement mag spring is needed, OEM spring can be used.  Additionally, users can gain another 0.15″ of spring space if you use the Rx Arms Benelli M4 Magazine Cap Titanium.

It is a simple process to expand your capacity with this extension, and requires no gunsmithing whatsoever.  See Benelli M4 Magazine Extension Installation video below. The Rx Arms Benelli M4 magazine extension is of the highest quality and best mag extension you can find.

Benelli M4/M1014 & Benelli M4 H2O Magazine Extension Colours

We offer two Cerakote colours:

  • Custom Dark Charcoal Cerakote for Benelli M4 Black Shotguns, to closely match M4/M1014 OEM magazine tube.
  • Titanium Cerakote for Benelli M4 H2O Titanium Cerakote Shotguns.

Note: For Black shotguns, parkerized finishes can vary from batch to batch, the Dark Charcoal colour may not be a perfect match to all Benelli M4 shotguns due to the variances in parkerizing.  Also note, Dark Charcoal is NOT black in colour, it is dark charcoal grey.

Benelli M4 Clone Compatibility

Below is a list of clones and compatibility with the Rx Arms Magazine Extension.  We do not guarantee the information below as it is taken from end user customer reports only.

  • Panzer M4 – NO
  • SDS S4 – NO
  • MAC 1014 – YES
  • Black Aces S4 Pro – YES
  • SDS Tac12 – YES
  • Aska M4 – YES
  • Sulun Tac12 – YES

Benelli M4 Magazine Extension Specs:

  • Rx Arms Benelli M4 Magazine Extension is specifically designed and tested for the Benelli M4/M1014.
  • Direct replacement for Benelli 81043 (for USA residents)
  • Rx Arms Benelli M4 Magazine Extension will replace the factory neutered plug from Benelli, and increase capacity for +2 for USA residents, Canadian/USA residents need to plug the tube themselves to comply with Canadian/USA state firearm laws if required.
  • Material: Rx Arms Benelli M4 Magazine Extension is made from 4140 hardened steel.
  • Weight: 102g
  • Rx Arms Benelli M4 Magazine Extension is Custom Cerakote Dark Charcoal for black shotguns or Titanium Cerakote for H2O shotguns.
  • Lifetime warranty like our other parts and accessories.
  • Made in Canada.
  • Ships to USA and Canada.
  • Refund and Returns policy can be viewed here.

Benelli M4 Magazine Extension Installation:


Canadian/USA Residents Legal Compliance:

  • These tubes are NOT plugged for Canadian Legal Capacity.  It is the gun owners responsibility in Canada/USA, to ensure that their magazine capacity is compliant with Canadian/USA State law, in addition to USA 922 (r) compliance.  Rx Arms Solutions takes no responsibility to plug this tube to legal capacity of 5 x 3″ shell in Canada, or capacity limits in individual states in the USA.

USA Residents Customs Info:

We have been shipping our products to USA customers for years without issue, below are some items to note:

  • USA customer are responsible for any customs tax/duties, however anything under $800 USD is rarely taxed according to the research I have conducted. This is not legal advice, do your own due diligence.
  • According to the ATF, a Form 6 exemption is granted for sporting shotgun parts/accessories as stated on point 6. “Sporting shotgun parts other than firearm frames or receivers or barrels.” [are exempt from Form 6].   The Benelli M4 is a shotgun that is legally imported into the USA as “generally recognized as particularly suitable for or readily adaptable to sporting purposes.” (further details on this can be read in the ATF National Firearms Act Handbook).  As such, it is a sporting shotgun when it is imported into the USA, and according to the Form 6 exemption list, does not need a form 6 when importing parts and accessories..  This is not legal advice, please do your own research and due diligence.
  • USA Customs Label “Sporting Shotgun Accessories” (HST Code 9305.20.80 Found in Chapter 93)
  • USA Shipping: This item will be shipped with tracking.

Other International Shipments (IMPORTANT):

    • Other International customers are responsible for any customs tax/duties.  This is not legal advice, do your own research and due diligence.
    • International customers are solely responsible to comply with all of their local laws and regulations.  Rx Arms Solutions is not liable for any legal compliance issues that may arise from the purchase of my products.
    • For Customs, this part will be labeled as “Shotgun Accessories”: HST Code 9305.20.00
    • International Shipping: Items will be shipped with tracking.
    • Once shipped, this item is non refundable, if it gets lost in the mail, it is the customers responsibility and cost.  Rx Arms Solutions is not liable for any lost shipments.

Backorder/Preorder Terms:

    • Backorders are payment in full.  If, for whatever reason, you need to cancel the backorder before it ships, I will need to take 5% off the total backorder amount to refund the amount.  This will cover charges my credit card processor charges me.  For example, if the order was for $100, I will keep $5 and return $95 to you, to cover my back end costs.
    • When ordering a backorder item with an item in stock, the shipment will be delayed until all items are in stock.

Feel free to check out my other Benelli M4 Parts and Accessories which you may enjoy.  Get more information on the Benelli M4 Shotgun. The Benelli M4 is a versatile shotgun that is great to carry when hiking, hunting, or getting outdoors in the woods. 

98 reviews for Benelli M4 Magazine Extension

  1. Anonymous (verified owner)

    Easy installation, it was on par with price of other retailers and was cheaper than purchasing a new tube all together.

  2. James Engebretsen (verified owner)

  3. Herbert (verified owner)

  4. Chris (verified owner)

    Well made, cost effective. Took less than a minute to install.

  5. Dennie Dillard (verified owner)

    Works amazing.

  6. Anonymous (verified owner)

    excellent product , installation as per the video

  7. Dylan Bouchard (verified owner)

    Wonderful product 5/5! I think this is the best upgrade you can buy for your Benelli M4. I was worried after reading online that some companies were having the colors of their tube extensions not match perfectly to the original M4’s. RXArms nailed it. Basically a 1-1 color match and I am very very happy buying from this company! I also purchased their titanium end cap and bolt release tab. I would highly consider adding both of those to your cart as well. I Will definitely shop with you guys again! 🙂

    Image #1 from Dylan Bouchard
    Image #2 from Dylan Bouchard
    Image #3 from Dylan Bouchard
  8. Michael C. (verified owner)

  9. André A. (verified owner)

    Excellent product and fast delivery. For my part I would have liked the colors of the parts on the website to be more realistic as I believed from the photo that my part would be matte black like the original part of the M4. But definitely a great product. Long life to your business. I refer her without hesitation.

  10. Anonymous (verified owner)

    Good Product, of course it fits the gun and makes it more fun. Props brother

  11. Peter W. (verified owner)

    Well made with a precise fit and nice finish. Good quality all around.

  12. Michael M. (verified owner)

    Fit and finish were great! It matched my gun perfectly.

  13. Nick S. (verified owner)

    High quality. Exactly as advertised.

  14. Michael B. (verified owner)

    I recently purchased a Benelli M4 in silver cerakote (H2O) finish. I wanted a magazine extension that matched that color. RX Arms had the product that matched perfectly. It was a simple install and it works as advertised. Excellent product.

    Image #1 from Michael B.
  15. Anonymous (verified owner)

    Fits perfect, looks great!

  16. Johnathan Tabucbuc (verified owner)

  17. Spencer Johnson (verified owner)

    Fit and finish was a perfect match to my M4 H2O. Could t be happier!

  18. Mitch Simon (verified owner)

  19. Jason (verified owner)

    Great quality. Easy to install.

  20. Anonymous (verified owner)

    Good product, fast shipping.

  21. Anonymous (verified owner)

    Quality product, thanks

  22. David P. (verified owner)

    Very nice

  23. Xun (verified owner)

  24. Jeffrey Rahuba (verified owner)

  25. Robert Carter (verified owner)

  26. Eric S. (verified owner)

    Very easy install with minimal tools and the guide video is spot on! Extremely happy with this purchase!

  27. Michael A. (verified owner)

    Excellent service & product. Don’t think twice. Buy this!!

  28. Jeff H. (verified owner)

    Quality part.

    Image #1 from Jeff H.
  29. Jason S. (verified owner)

    Fit and finish are excellent as well as the color match. Fast shipping and an excellent value compared to the Benelli.

    Image #1 from Jason S.
  30. Scott Miller (verified owner)

    Perfect finish match and just an overall quality piece!

  31. Paul (verified owner)

    It’s a nice price, however I can only fit 6 shells

    • Robb Hutzal (store manager)

      Hey Paul thanks for the review, 2 3/4″ shell can vary in length, not all of the shell designs will allow 7 in the tube due to unfired length variances. It is unrelated to the design and function of the mag extension that we sell.

  32. Jonathan P. (verified owner)

    excellent product of very high quality. extremely pleased

  33. Bill C. (verified owner)

  34. eugene (verified owner)

    Great quality, great service

  35. Andrew (verified owner)

    Excellent tube extension, fits perfectly flush with my M1014. Can now fit the proper amount of shells in the magazine. Quality is excellent as always from you guys. Thanks!

  36. Craig (verified owner)

    Fits perfectly and easy to install. Color is exact match for gun.

  37. Michael A. (verified owner)

    Great product, fit and finish are spot on. Super easy install I left the magazine tube retainer off as I saw on the video..

  38. Michael R. (verified owner)

    Easy to switch out and love my now un-neutered Benelli M4 man ! Thanks a lot

  39. Scott (verified owner)

    Very fast delivery! You couldn’t ask for a better fit or finish. This is the company that you want to buy from.

  40. Sheldon (verified owner)

    I just want to say that Robb has done every thing possible to help me set up my Benelli clones. Great customer service. No one could ask for anything more. I am very satisfied with the product and how it functions.

    • Robb Hutzal (store manager)

      Hey Sheldon, I’m sorry that the colour didn’t match the more black tones on your clones compared to the more dark grey’s on the Benelli M4. If I can help you out with anything else don’t hesitate to contact me!

  41. John K. (verified owner)

    Fast delivery product was as advertised

  42. hoang pham (verified owner)

  43. Adam (verified owner)

    Easy to install, fit and finish is perfect. Im glad i bought IT

  44. Alan s. (verified owner)

    Everything was as advertised, finish was flawless and installation was cake.. absolutely satisfied

  45. Anonymous (verified owner)

    Works as expected. Allows more shells in the tube and matches the factory colours. Machining is also perfect. You can tell it was made with care.

  46. Armen R. (verified owner)

    Great quality perfect fit. Color matches the bottom barrel. Highly recommend

  47. Andrew (verified owner)

    Good price. Fit perfectly. Would highly recommend this company.

  48. Nathan (verified owner)

  49. Brian Lindsey (verified owner)

    Parts shipped the day after I ordered it and arrived in a week. Easy to install and both matched finish and fit perfectly.

  50. Anonymous (verified owner)

  51. Some old guy (verified owner)

    Fit and finish spot on. Still don’t believe I received a blemished one. I’ve looked everywhere. No issues. Perfect compliment to the 6 position receiver extension. Couldn’t be happier unless I lived in a free state.

    • Robb Hutzal (store manager)

      You definitely got a blem, I just have very high standards. Enjoy the extra capacity!

  52. Luis L. (verified owner)

    Great product!

  53. John S. (verified owner)

    Very happy with this purchase I had a couple issues due to myself. Rob reached out to me and personally gave me some insight into what mistake I was making during reassembly greqt guy great products. Very reasonably priced I will definitely buy from these guys again

  54. Lee (verified owner)

  55. Joel O. (verified owner)

    Beautifully finished extension. Fits perfectly. Very pleased with this purchase.

  56. Jonny Cannon (verified owner)

    Color-matched perfectly. Threads on easily, and I paired it with the titanium end cap. Everything went together simple & quick.

    Image #1 from Jonny Cannon
  57. Mathew (verified owner)

    I got the titanium finish and I think it’s absolutely beautiful.

  58. Michael C. (verified owner)

    Ordered the wrong colour and they were willing to work with me to get it all sorted out. Now that it’s on I have to say that I love it. I know it’s a small detail but I think it helps with the overall look of the gun and the extra capacity sure doesn’t hurt. Keep up the good work!

  59. Ryan T. (verified owner)

  60. James M. (verified owner)

    It’s awesome

  61. Daniel DiazSantiago (verified owner)

    Excellent customer service, excellent product. Had to change to mag tube on my panzer m4 to make it fit properly, I’ve had zero problems with it since.

  62. Michael C. (verified owner)

    Do yourself a favour and get it.

  63. Zachary Stinson (verified owner)

    Perfect coat match for factory 5 round tube. Would honestly be fine with never upgrading to the full tube 7.

  64. Abdulla J. (verified owner)

    The finish is super close to the magazine tube. Well designed and executed.

  65. Anonymous (verified owner)

    easy to install and no gun smithing required simply remove the old one and install the new one. also such a nice feature that you don’t have to buy a new mag tube spring, and to top it all off if there’s any confusion there’s a video on the site you can reference for installation.

  66. Michael C. (verified owner)

    Easy to install. Looks and functions great.

  67. Joe (verified owner)

    I purchased one for my Blk Aces Tac S4, fits like a glove and looks awesome. Easy install, definitely recommend picking one up. Its worth the wait on shipping. I bought a bolt release tab, expecting the same level of quality.

  68. Anonymous (verified owner)

    Just a quality product !!

  69. Mike (verified owner)

  70. Richard K. (verified owner)

    Excellent, as expected.

  71. Josh N. (verified owner)

    Great extension matched perfectly functions flawlessly.

  72. Anonymous (verified owner)

  73. Brandon M. (verified owner)

    Fits perfectly, machining is perfect, colour is a little off but would recommend to a friend

  74. Othello shirley (verified owner)

  75. Anonymous (verified owner)

    Great product

  76. Jeff T. (verified owner)

    The titanium coating matches my gun perfectly. Quality item

  77. Beau Osteen (verified owner)

    Fits like a glove and looks great doing it….buy with total confidence!

  78. Larry (verified owner)

    fits well – looks great – thanks

  79. James Myshak (verified owner)

  80. Joshua Kelly (verified owner)

    Looks great, fits great, easy to install. Definitely recommend.

  81. James Myshak (verified owner)

  82. Anonymous (verified owner)

  83. Anthony Acuna (verified owner)

    Received my magazine extension tube and immediately examined it prior to installation. The quality, fit, and finish of this extension tube is truly astonishing. Attention to detail really speaks for its self. The machining is clean and accurate. Easily installed my M4 with no issues, no burrs or sharp edges. The color very Very closely matches the existing magazine tube. I truly am impressed. As a bonus, the shipping was really fast. Five stars is not enough for this level of craftsmanship and service. Thank you for an amazing product.

    Image #1 from Anthony Acuna
  84. Alex P. (verified owner)

    Good quality

  85. Axel (verified owner)

    Superb craftsmanship! Fit and finish exceeded my expectations!

  86. Anonymous (verified owner)

    Excellent fit and finish

  87. Greg R. (verified owner)

    Great parts at reasonable prices in unreasonable times. Upgraded my platform to the next level!

  88. Anonymous (verified owner)

    Great product.

  89. Anonymous (verified owner)

    quick shipping as described

  90. Tyler (verified owner)

    Colour matched up good, craftsmanship is excellent. Made in Canada. Highly recommended.

  91. Anonymous (verified owner)

  92. Anonymous (verified owner)

    Answers his phone , shipping is fast, product is perfect. Third time purchasing.

  93. Anonymous (verified owner)

    Pure and simple excellence.

  94. Bayne Balaski (verified owner)

    Great product. Well made precise fit and finish. Finishes off the M4 to look like it should. Robb continues to make superb products for the M4.

  95. Dave (verified owner)

    Perfect machining; excellent quality! The dark cerekote is a very good match and looks far better than the original!

  96. Babayaga (verified owner)

    Awesome!! Looks great; got the Dark Charcoal, and as previous reviewer has said, colour matches almost perfectly with OEM.
    Very nicely made piece, and customer support was friendly and helpful.

  97. USA Guy (verified owner)

    Fit and finish is DEAD ON with a factory part. Cerakote matches H20 model EXACTLY. RX is doing some great work and this is just another example. Buy it.

  98. Jacob (verified owner)

    Best of the best! Very well made, no burrs or rough edges, perfectly uniform and just feels like it will stand up to anything. Fit and finish are second to none. Color match could not be any closer, can barely notice the slight difference. Looks so much better than the factory limiter!

    Image #1 from Jacob
    • Robb Hutzal (store manager)

      Thanks Jacob, cerekote can look different in all types of lighting, which effect the colour depending on the light in the environment you’re in. We spent a lot of time fine tuning it to match the parkerized OEM tube as close as we possibly could in multiple lighting situations. Glad you are enjoying it!

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