MagGuts +3 Conversion for Smith & Wesson Shield Plus-10 Round Magazine

(123 customer reviews)


This MagGuts conversion updates your 10 round factory Shield Plus magazine to 13 rounds and adds only a pinky extension at the front which tapers to almost nothing at the rear.  You get a much better grip by getting full pinky engagement with almost no sacrifice in concealment ability.

  • Extremely reliable feed and slide lock
  • Improved grip
  • Excellent ergonomics and appearance
  • Highest quality materials
  • 100% Made in USA

Uses our Patented ZeeSpring (#11,079,192) and Patent Pending hybrid follower.

This item is not available for shipment to California.

SKU: CVN042 Categories: ,

123 reviews for MagGuts +3 Conversion for Smith & Wesson Shield Plus-10 Round Magazine

  1. Justin (verified owner)

    Ran 200 rounds through them today at the range and they worked flawlessly!

  2. Anonymous (verified owner)

  3. John H. (verified owner)

  4. Gary M. (verified owner)

    This was for a Shield Plus. Although I use the standard SW 13 round extended magazines the 10 round is slightly smaller, but I needed a pinky extension. So when the +3 came out and had the pinky extension AND +3 rounds that matched the extended mag, so much the better. I just wish there was a + for the 13 round mag that did not add a physical extension.

  5. Paul F. (verified owner)

    Couldn’t wait for this product to be available. Installed very easily – completely filled magazine with 13 rounds. Going to cycle at the range to see how it empties and reloads. 👍👍👍

  6. Scott Delio (verified owner)

  7. JonPaul (verified owner)

    Guess it’s a good product but bought it for my EZ Sheild that holds 10 rounds of .30 super carry and it doesn’t fit. Grandson owns a Sheild will see if he can use it.

  8. David A (verified owner)

    This “ generation” of magguts much easier to install then older extensions. The faceplate means easier/ quicker install.

  9. Travis H. (verified owner)

    MagGuts have to be just about the best thing since sliced bread. When you’re used to carrying 14+1 in a 365XL, the standard 10+1 of the Shield Plus doesn’t feel quite adequate for daily carry. This brings the Shield Plus up to par without affecting concealability and even saved a magazine that I had lost the lock plate from. Definitely a must have.

  10. mike s. (verified owner)

    Very easy to install. Works smooth as silk.

  11. PHILLIP (verified owner)

    Does what it claims. Excellent fit and finish; better than OEM. Pay attention to the installation instructions.

  12. Greg (verified owner)

    This unit was a little bit more difficult to insert into the mag than are the Shield single stack units. Getting 13 rounds into the mag was easy the very first time. I have only had one outing so far to use this unit, and feed, function and slide lock all worked every time.

  13. Anonymous (verified owner)

    I ordered the +3 extension as soon as it was available and receive it just a few days later. Install was a little fiddly but not terrible. Mainly just keeping the spring compressed while installing the base plate. Loading up the full 13 rounds was easy. I put ~200 rounds through the magazine without any malfunctions.
    The extension adds just enough length up front for a full grip and greatly improved handling. Since I was expecting to pay around $20 for just a regular extension anyway, the price to also add 3 more rounds to the mag makes the $34 worth it.

  14. George (verified owner)

    Excellent conversion in the 10rd magazine making it 13rds. I never liked the 10rd magazine before since it left my pinky hanging off the bottom. Now with the MagGuts kit, the 10rd has a full grip with the bonus of 3 additional rounds.

  15. Ed Anderson (verified owner)

  16. Teddy Rivera (verified owner)

    Great product made an amazing shield + better very easy to install in the stock mag. Now I have 12+1×2 definitely a must have

  17. Ronald Drews (verified owner)

    The Brass screw or rivet that holds the mag plate in place has a tendency to let the plate slip over it. You should look into it and see if a screw with a larger head would help. Otherwise I like the flat spring.

  18. Randy Widdis (verified owner)

    Work great!

  19. Randy Eggleston (verified owner)

    Installment was easy and the fit is perfect. The spring and base plate are very well made and fit very well. The magazine loads well and the gun operates perfect with the conversion.

  20. Terrence M (verified owner)

    Awesome concept BUT you can manually push the baseplate over the detent without depressing it first. Shield plus 10+3 mag ext.

  21. Michael Labus (verified owner)

  22. Robert Burrows (verified owner)

  23. Kevin (verified owner)

    Very happy so far. Ran it in a class and it performed fine. I am taking it to the range later this week to run some drills with it and see if it is getting closer to be able to fall into my carry routine mag.

  24. Christen P. (verified owner)

    Great product, looks good, fast shipping and functions without any problems at all👍👍 highly highly highly recommend!

  25. Anonymous (verified owner)

  26. Jay D. (verified owner)

  27. Isaiah (verified owner)

    So far the conversion kit has been excellent. No issues with 115gr or 124gr.

  28. Eric Bagdikian (verified owner)

  29. Len G. (verified owner)

    Works beautifully, as expected, and shipping was fast! Just ordered 2 more for a different handgun.

  30. Anonymous (verified owner)

  31. Joe C. (verified owner)

    Converts standard 10 round mag to 13 rounds in addition to providing an enhanced grip vis a vis a place for your pinky finger.

  32. Wesley (verified owner)

    VERY finicky install but once it’s in there it works as advertised. Really wish the spring and follower were more easily attached/jointed to make installation easier.

  33. Patrick M. (verified owner)

    Fit and function is great. Magguts always work flawlessly in my experience.

  34. Robert W. (verified owner)

  35. Keith (verified owner)

    Easy to install. I was able to load 13 rounds into the 10 round magazine with no problems.

  36. Neil (verified owner)

  37. Luke (verified owner)

    Awesome product! Over 200 rounds fired using it and I’ve had no issues. The fact I can carry 14 rounds in a firearm of this size is frankly mindboggling.

  38. Rob G. (verified owner)

    Don’t wait, get this for your standard capacity magazine. It replaces the internals with an improved spring and follower, plus you get the bonus of 3 more rounds and an extended pinky rest.

    It’s stupid easy to install too.

  39. Eric B. (verified owner)

    Ordering is easy and shipping is quick. Relatively easy to install and works well. Although you can only contact them by email, customer service is relatively quick to respond and helpful.

  40. Myles C. (verified owner)

    Awesome. Love it fits my hand perfect.

  41. Patrick M. (verified owner)

    Works perfectly

  42. Anonymous (verified owner)

  43. Derek (verified owner)

    Quality product. Improves capacity and function of OEM mags. Now have the Magguts extensions on all my Shield mags. Well worth the price.

  44. Calvin (verified owner)

  45. Chalton V. (verified owner)

    Awesome product
    Reliable shot 500 rounds with no problem
    And I went from 10 rounds to 13 rounds and one in the chamber 14 rounds on my Shield plus

  46. David S. (verified owner)

    Easy to install and works perfectly. I really like the pinky extension. It gives me a better purchase without compromising concealability.

  47. Paul Willis (verified owner)

    Shield Plus, was carrying with the factory 13rd mag. Switched to +3 conversion for the 10rd factory mag. Initial impressions: much more comfortable to carry and to shoot. I’ve put 5 mag reloads, using Critical Defense 115gr or 115Gr FMJ, no issues or failures! Love the look and feel of the pinky extension.

  48. RONALD P. (verified owner)

    Wasn’t hard to install, and works !

  49. Asaf Shoham (verified owner)

    Brass button too low, bottom plate is opened and spring pops out after few rounds and mag change

  50. John L. (verified owner)

    Easy to install worked perfect

  51. Jonathan (verified owner)

    Outstanding – installed easily, loads easily, and carries 3 extra rounds with negligible loss in concealability. Stippling and finish match factory grip exactly. Put 100 rounds through without issue. Be sure to follow directions closely – I think some others that mentioned the baseplate coming off didn’t catch the note about ensuring the spring catch is on the outside of the magazine.

  52. Richard Wolfe (verified owner)

    This mag and follow run perfectly. I have shot about 200 rounds with no troubles! 👍👍👍

  53. Michael (verified owner)

    The +3s work great as I expected. Good job.

  54. Jarred B. (verified owner)

    Awesome product!

  55. Anthony Bahde (verified owner)

    Fast delivery. Easy directions. Great product. +3 rounds with minimal print.

  56. Brandon Smith (verified owner)

    Great product, highly satisfied

  57. Paul Campbell (verified owner)

    So far with 260 rounds not one issue I carry it in my most impossible firearm the one I use for self defense!

  58. Charles (verified owner)

    Excellent product for shield plus.

  59. Andrew M. (verified owner)

    Was a very easy install. Fast delivery.

  60. Robert (verified owner)

    Love this product!

  61. Taylor (verified owner)

    Bad before the good. Follower is kind of janky and can pop out of the top of the magazine a bit. With use it should loosen up and chill out. Installation was also a bit screwy. But it works as intended and does so reliably so far (about 200 rounds through the mag).

    This gives you the capacity of the OEM 13 round magazine but with a good bit trimmed off the backside. It’s easier to conceal and gives me a full grip. I recommend this for anyone that wants a smaller profile without sacrificing capacity.

  62. Steve B. (verified owner)

    I can put 13 rounds in the shorter 10 round mag is awesome! Function and reliability are great. I’ve put quite a few rounds through it with no issues. I will be upgrading all my 13 round mags with MagGuts as soon as they are back in stock!

  63. Tracy (verified owner)

    Install was easy enough. Next stop is the range…

  64. Roy Rhodes (verified owner)

    I received the product very fast. Installation was simple and easy with the detailed included instructions. I did have a minor issue and emailed my concern with quick response. They walked me through a few details to check to make sure I had installed the piece correctly. They determined it was a faulty part and was sent out a replacement part with a few days. Very happy with product and will purchase more items in the future.

  65. Michael Gallagher (verified owner)

    Haven’t tested it yet, but quality is good, easy install, loaded all rounds easily, really like the grip of the base plate..

  66. Anonymous (verified owner)

  67. Michael Knepley (verified owner)

    Good product, works as advertised. Wish they would get the +2 product for the 15 rd in stock.

  68. James Bellue (verified owner)

    Hand written thank you letter was unexpected and appreciated, especially the Bible verses that were quoted. Hope to be a return customer soon

  69. David C. (verified owner)

    Works amazing, better than the stock 13 round mags.

  70. Brian G. (verified owner)

    Shot 3 full mags without incident. So far so good, will continue testing.

  71. Jason (verified owner)

    Only ran the kit in one class but it didn’t break or pop apart when it was dropped on rocks repeatedly. Had one double feed when the mag was down to 2 rounds. I will continue to run the mag in classes and during training before trusting the system for carry. It seems promising. Unlike the factory 13 round mags, this kit leaves some compressabilty of the rounds when the mag is fully loaded, BIG PLUS.

  72. Nick R. (verified owner)

    Great product. Added just enough space for my pinky finger. Finger wouldn’t fit on grip before part installed. And the extension looks like it should have came from the factory on the pistol it matches well.

  73. Anonymous (verified owner)

    Very difficult to install. Once installed the base plate kept coming off. Returning them.

  74. Oday Thabteh (verified owner)

  75. Danny (verified owner)

    Works great. Simple install and ran a few clips through my gun with no issues.

  76. Kevin O. (verified owner)

    Seems well made and feeds reliably. I wish it came with a flush base plate instead of with a pinky extension. The extension makes it similar in length and concealability to the OEM Shield Plus 13 round extended magazine. I will just use the OEM 13 rounder instead. I would buy a flush base plate if it was available.

  77. Kory (verified owner)

    Best upgrade for shield plus. I love my stock 13 round mags but find they print in my carry position. This extension allows me to carry 13 rounds without the issues or printing more and have had zero issues with feeding so far. Will be buying more.

  78. Michael N. (verified owner)

    It’s a have must accessory. Turn that 10rd mag into a 13rd mag without adding any additional length (that’s if you don’t already have a Pearce grip extension on it). Considering getting a few more in the future.

  79. Rodney (verified owner)


  80. Anonymous (verified owner)

    Great product! Works exactly as advertised, thank you!!!

  81. Frederick (verified owner)

    I gave it 4 stars only because I haven’t shot the pistol yet. I did manually eject the rounds out the magazine and everything ran fine. I had an issue with the pinky rest sliding off. I reached out and they responded very quickly with an enlarged photo showing me what I had did wrong, so that issue was on me. After that the pinky rest is held on Rick solid. After I shoot this pistol I’m sure I will be looking to purchase more extentions from MagGuts

  82. Craig DeCelles (verified owner)

    This product is awesome! I get 2 extra rounds in the mag and I have big hands, so now my pinky can help me grip my gun lots better!

  83. Dean Curtis (verified owner)

    This the first mag I have ever disassembled. By using the MagGuts instruction sheet it was a breeze. My 10 round mag now holds 13, but the real bonus is the extension which gives me much more control. Very happy with my purchase.

  84. Miguel Rivera (verified owner)

    Exact fit

  85. Dmitri (verified owner)

    Installation was easy, awesome results

  86. Paul V. (verified owner)

    Quick delivery and an excellent product. My third magazine spring set purchase and I’m sure it won’t be my last. Love it.

  87. Jay S. (verified owner)

    Awesome as usual.

  88. James Janiczek (verified owner)

    I haven’t been able to run the magazine through my Shield yet, but I had no problem loading 13 rounds using an UpLula mag loader.

  89. Josh (verified owner)

    Bought for a buddy and it works great in the 10rd mag – allows for a pinky hold unlike stock mag

  90. Chris (verified owner)

    Haven’t had a chance to shoot yet but everything seems fine. Easy change out, cycles just fine by hand and much easier to load.

  91. Michael Gillespie (verified owner)

  92. Dave (verified owner)

    I love these 10+3’s. They are the same size as the Pierce pinky extenders, and yet you get an extra 3 rounds. Phenomenal! My only complaint is that I’ve had them come apart during IPDA matches when hitting the ground/floor during mag changes….. the little spring that holds the baseplate on could be a little stronger, as my Magguts mags blew up on me (upon hitting the ground) a bunch of times at my last match. Silver lining – I got really good at putting them back together! Regardless, I love having 13+1 in a little 3″ shield plus. Hoping they can make the new 15 rd mags into a 17 without adding any extensions (like the did on the 13+2’s).

  93. Doug PACKARD (verified owner)

    Your service was quick and the changeover was easy.

  94. Henry (verified owner)

    This review is winded but thorough. Had never heard of Magguts until a user mentioned them on YouTube, specifically the Shield Plus 10 rounder +3. Immediately became highly interested. and purchased. I carry the 10, the 13 is slightly too long causing it to print. Have medium size hands so a pinky extension is a requirement on the 10, if not my pinky does not cover. Not a fan of replacing any internal OEM parts with aftermarket for obvious reasons. However the spring on the Magguts is beefier and better made IMO than the OEM S&W. So this was an exception. Also before writing this review 200 successful rounds without a single issue was good enough for me, open slide every time when rounds completed. I have a very expensive habit of buying the latest and greatest carry pistol every 1 to 2 years. In my mind this sub $40 kit saved me over $600. I’m very pleased with it, was worth every penny. Installation tip: not only wear safety glasses, but would take it a step further with protective gloves. The metal edges on the spring are very sharp.

  95. Tammy W. (verified owner)

    too tight. can only get 12 rounds

  96. John B. (verified owner)

    works great,fed flawlessly

  97. Tyler L. (verified owner)

    Great product and fast shipping definitely a good recommendation!!🙏🏽

  98. Ross McKenney (verified owner)

    Great product that delivers on what it claims to do as tested on the pistol range. It is a little fussy to install, but knowing the little tricks now should cut installation time down dramatically for next one!

  99. Jason DeVito (verified owner)

  100. Rafael Ocasio (verified owner)

    Easy to
    Install. Will buy the kit for my 13 rouder

  101. Gabriel J. (verified owner)

    It’s not a bad product. It’s well built and does indeed put 3 more rounds in. I wanted to love it. But… What it does not do is save you any appreciable space over the OEM 13 rounder. On the rear side it’s a smidge shorter, but on the front it’s actually a bit longer. It ends up a wash. And your mag will no longer stand up straight (it wobbles) making loading more difficult, and now your gauge holes that tell you how full the mag is don’t line up. If it were $10-$15, it would be a nice cheap way of getting extra shots in. But at this price, you can just buy an extra OEM magazine (and have another mag in your kit). If it actually saved the size, or was much cheaper, this would be an amazing product. As it is, it just gives you a slightly worse version of what you can already buy OEM. I’m not returning it… but I also don’t think I’d recommend it (again, at this nearly-$40-after-shipping price).

  102. Michael S. (verified owner)

    Works like a charm. Happy with purchase. Highly recommend!

  103. Steven O. (verified owner)

    I ordered the wrong one for my gun I have a s&w 9m shield w/single stack, my fault thanks

  104. Anonymous (verified owner)

    This kit turned the 11 round magazine from one I would never use to one I do. The only thing I can complain about is the cap moves a lot. Even when the magazine is loaded it moves. I don’t forsee this being a issue but it is note worthy. This is probably a magazine I’ll only use at the range.

  105. Tim Lanier (verified owner)

    Prompt service , fast delivery, easy assembly whats not to like!

  106. Joseph N. (verified owner)

    Fit and finish as expected. Adds three rounds to Shield Plus ten round magazine which is also a magazine for my S&W Equalizer. Function is perfect. Now if you would produce a Magguts kit for the Springfield Hellcat!

  107. Ronald Deragon (verified owner)

    Quality product
    Well made, easy installation and works flawlessly. Would order again.

  108. Anonymous (verified owner)

    Easy install, quality integration and super fast shipping! I don’t anticipate any issues at the range, but I’ll update once I test drive.

  109. Anonymous (verified owner)

    Works flawlessly.

  110. David Smith (verified owner)

    Product as described. Assembly was easy. Packaging is very good. Even with standard delivery, received it 2-3 days. Will definitely purchase more .

  111. Paul Weeden (verified owner)

  112. Larry Y. (verified owner)

    Haven’t used it a lot yet. Seems good to go like the several other springs I have gotten from MagGuts.

  113. Edwin Collazo (verified owner)


  114. Robert (verified owner)

    Increased capacity & a much better grip w/ my large hands so that all fingers can be used.

    ONLY drawback, be careful when itstallling. the metal edges are very sharp & I got several cuts on my hands as a result. WEAR GLOVES when installing.

  115. Gary (verified owner)

    Easy install, works flawlessly. Already put 200 rounds out of this mag with no issues after initial install. What a great upgrade!

  116. Brandon (verified owner)

    Everything was great, shipping was fast and install was easy with directions. Fired a couple hundred rounds of range and defense ammo with no issues. Purchased multiple times from magguts in the past and am always satisfied.

  117. TyJuan L. (verified owner)

    This new +3 convention kid is amazing!!

  118. Daniel E. (verified owner)

    Works as advertised. Simple to install, and easy to use. Amazing I can get three more rounds in the stock 10rd magazine.

  119. Mike S. (verified owner)

    Tried like crazy, but there is no way I am get +3 in this mag. +2 is all I can get. I do still like your product. It’s a nice looking piece of equipment that complements the pistol.

  120. Rolando H. (verified owner)

    It’s not easy to install, but as long it works I’m good with it, only disappointed with USPS taking twice as long to deliver the package.

  121. Jose R. (verified owner)

    product works as advertised, converted my 10 round magazine to a 13 round magazine, with simple instructions and straightforward I was done in no more than 20 minutes.

  122. Craig Reel (verified owner)

    Great product. Shipping was quick.. It was easy to install. I’ll definitely buy from MagGuts in the future.

  123. Antonio S. (verified owner)

    Absolutely loved it, like all your other products. Easy to install, if I had an issue it’s because I didn’t fully read directions thoroughly. Once I did piece of cake. I ran 150 rds. without one single issue, so I ordered another. I’m confident like the other Magguts products I purchased these will perform great. Thank you … waiting for the plus for 15rd shield plus magazines.. Tony ..

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