Sig Sauer P365 X & XL +2 for 12 Round Magazine

(138 customer reviews)


This conversion reliably turns your Sig P365 X or XL 12 round magazine into a 14 round magazine with almost no length increase.  The spring, follower, and base are replaced with MagGuts™ components while the magazine housing and magazine sleeve are reused.  We pushed innovation through our “out of the box” approach to R&D and came up with a novel system that turns an already impressive capacity dense firearm into a weapon with a density of firepower that almost seems impossible.  With this conversion you will get:

  • Reliable feed and slide lock
  • +2 capacity increase with almost no sacrifice in length and no impact on concealment
  • Easy to load
  • Very slight pinky extension for perfect grip
  • OEM – like fit and feel
  • Highest quality spring and component materials used.
  • Cutting edge magazine technology [patent(s) pending]

Compatible with X and XL models and grip modules only.
This item is not available for shipment to California.



SKU: CVN041 Categories: , Tags: , ,

138 reviews for Sig Sauer P365 X & XL +2 for 12 Round Magazine

  1. David H. (verified owner)

    Works perfectly. What else is there to say? Good product.

  2. Ross C. (verified owner)

    Love it. Item installed easy took it to the range, shot great and locked pack. Plus I like the little bit of pinky extension. Looking forward to the plus 2 for the 15 rounder.

  3. William M. (verified owner)

    Have ordered and used the mags and was so pleased that I bought several more. Great product and service. Highly recommend!

  4. Rolando Rios (verified owner)

  5. Kevin M. (verified owner)

    What a great product, and very very easy install in my 365x. I’m going to be ordering more for my wife’s 365.

  6. Anonymous (verified owner)

    Haven’t used it on the range, yet, but in dry firing checkouts it’s done pretty good!

  7. Corey Wortinger (verified owner)

    Better than factory

  8. Michael M. (verified owner)

  9. Hunter A. (verified owner)

    Awesome product! Take your time installing correctly and all goes well!

  10. Anonymous (verified owner)

    Quality stuff as always from MagGuts!!

  11. mark smith (verified owner)

    Very satisfied. Please notify me when the Spring kit for the P365X15 round magazine comes out. Thanks in advance MS

  12. David Lowrance (verified owner)

    I love the +2 capacity, and the base plate is very good, I would use the base plate for the tiny bit of extra pinky support it gives me even without the +2 benefit. Now I need a +2 or +3 for my 15 round magazine that is now useless since I have 14 rounds in a much smaller magazine. Start working on it! Thanks.

  13. Jd (verified owner)

    Outstanding product!! Works flawlessly so far.

  14. Robert F. (verified owner)

    Awesome product that works flawlessly. Highly recommend!

  15. Steven (verified owner)

    I have used MagGuts products in my P365 with great success. Added capacity, easier to load, reliable. No brainer to pick up these for my P365 XL when they became available. Great product. Great American manufacturer.

  16. Brandon D. (verified owner)


  17. Kevin (verified owner)

    Excellent quality.

  18. Anonymous (verified owner)

    Easy to install, easier to load & 14 + 1 capacity w/ the 12rnd factory mags. The extra mm or so of lip on the mag base is also just right for a pinky rest. Home run upgrade for your EDC.

  19. Barry D. (verified owner)

    I bought one to give it a try and after a couple of mags of shooting with it I immediately ordered another one. Once installed it is no longer than the OEM 12 round mag but gives you 14 rounds. Worth it.

  20. Antonio Glaze (verified owner)

    I messed up during my install but the product is great and the customer service is even better!

  21. Steven K. (verified owner)

    Awesome product, drops right in to Sig magazine!

  22. Scott D. (verified owner)

    great service and great products

  23. Jake G. (verified owner)

    +2 capacity in a tiny package! Engineering masterpiece! only complaint was installing the spring was a bit of a pain.

  24. Roland (verified owner)

    This company has they’re act together. Quality product that works!

  25. Dustin (verified owner)


  26. Marc Haughaboo (verified owner)

    Now my BUG has the capacity of an EDC…

  27. Brian (verified owner)

    Great Product.
    Easy to install. The slightly thicker base plate makes the grip very comfortable.

  28. James W. (verified owner)

    I purchased 5 of the spring,follower and floor plate kits. Installation was straight forward,floor plate should be installed a few times before installing spring (this helps to remove any little bits of floorplate material that should not be there. Now while holding the spring , slide the floorplate on till the little brass button pops into place.
    The price is a bit high but hopefully that will change.

  29. Kertis P. (verified owner)

    Greatest thing since sliced bread! I’ve been using/installing MagGuts products since I first modified a pair of S&W Shield magazines with the MagGuts +1 kits. When I started using a Sig P365, I thought the Sig magazines could use a MagGuts upgrade. This kit for the 12 round magazine, turning it into a 14 round magazine is perfect! These actually allow me to carry my Sig with 15 rounds on board (14 + 1 in chamber = 15 rounds). If you own a Sig P365 or 365XL, you owe it to yourself to install the MagGuts upgrade.

  30. joseph j. (verified owner)

    Great product. Only had a few rounds through it. I’d prefer to have many more before I can sign off on reliability. Brilliant product.

  31. Ivonelly (verified owner)

    So far so good. Everything fit perfectly and very easy to install. I haven’t tested it yet but looks very promising.

  32. Dean Everette (verified owner)

    I purchased 2 kits and they were easy to install. I took them to the range and ran about 100 rounds of ammo through each. I used 100 rounds of 115gr steel cased, 50 rounds of 115gr brass and 50 rounds of 124gr brass. I had one failure to feed half way through the first magazine (with the 124gr brass ammo). After that I had no more issues. The Magguts kits make it easier to load and seat the magazine with the slide closed. The tiny bit of pinky extension helps with my grip. My one complaint is that the magazine rattles after loading the 14th round (no rattle with the first 13). That could bring too much attention to a CCW. I’m going to put another 100 rounds through each mag before I trust them with my life. So far they seem like a good product.

  33. Alison Rhyne (verified owner)

    I used the + 2 today at the range. Functioned perfectly. Now I am going to be two 10 round +2 and an additional 12 round. I am very pleased.

  34. David (verified owner)

    Ran perfect 130 rounds including 30 JHP. Easy to install.

  35. Eric (verified owner)

    I am very pleased with the increases capacity. It did extend the grip profile very little not an issue just wanted to be transparent. I want to buy more if them, but the cost is a bit much for me. However, the technology is amazing to be able to easily fit 2 more rounds with out failure after est. 200 rounds and more to come.

  36. Carl (verified owner)

  37. Esteban Flores (verified owner)

    Put about 200 rounds so far and no issue.

  38. Thomas Gardner (verified owner)

    I have been using Magguts kits for several years. Two Smith Shields, a Sig P238, these two and my most recent, the 12 rounders for my Sig P365. I have had nothing but success with these kits and rely on them 100%. Several hundred rounds through each pistol with zero malfunctions. I am still amazed that you can get 2 extra rounds with very little grip length. When I pick up more mags for my Sig P365’s we will do this again.

  39. Spencer D. (verified owner)

    Works as advertised. Solid construction, feeds reliably.

  40. Anonymous (verified owner)

    Magguts spring and follower is higher quality than the OEM. A lot easier to load specially at the last 2 rounds. Very happy with purchase.

  41. Sean L. (verified owner)

    Did not work. Installed and reinstalled several times and all that ended up happening was a stuck spring in the magazine body and having to pour the rounds out. I finally gave up after the tenth try and removed the kit and reinstalled the original spring follower and baseplate and resigned the Magguts kit to the junk drawer where it belongs. I would not recommend trusting your life to this spring kit. Also I doubt anyone ever gets to read this review.

    • admincorso (store manager)

      The conversions definitely work. And of course we did not sensor your review! I’m not sure what happened during assembly, but we will contact you via support and help you get this resolved.

  42. Roy S. (verified owner)

    Does not have a grip sleeve or allow you to use the SIG sleeve

    • admincorso (store manager)

      There is no grip sleeve used on the 12 round XL or X magazine. Maybe you ordered the wrong item. Do you have the standard P365 (not X or XL)? If so you ordered the wrong item. If you contact we can help get this resolved.

  43. Joe (verified owner)

    Easy to convert your stock mags. Works great no feeding issues. Now 14rds from a Sig P365xl that’s legit!

  44. William M. (verified owner)

    Easy installation, discreet extra capacity with no downside.

  45. Abran V. (verified owner)

    I recently install a MagGuts spring on my 365xl and it fit beautifully. The only reason I gave four stars instead of five stars, is because I haven’t had a chance to run it at the range. If all goes well at the range, I’ll be grabbing a couple more for my other mags. Also, as a bonus, you can load all 14 rounds easily into the 365xl mag. Sig 365xl stock mags make that 12th round real difficult to get in there. It’s almost hard to believe that it’s the same mag.

  46. William M. (verified owner)

    It works as described, what more can you ask of a product. I actually put 100 rounds through the magazine down range without any problems today.

  47. Jonathan K. (verified owner)

    Does exactly what it’s supposed to! I get an easy +2 in my P365X. Only comment is I wish it was compatible with aftermarket basepads and not just the magguts one that comes with the spring/follower kit. This would have made it a godsend! Please consider future compatibility, or releasing a pinky extension for the XL models akin to other brands!

  48. Jeffrey Mosley (verified owner)

    This works as advertised , took only a few minutes and just like that went from 12 to 14 rnd mag . Will order again , highly recommend.

  49. Anonymous (verified owner)

  50. Scott M. (verified owner)

  51. William W. (verified owner)


  52. Joe (verified owner)

    Amazing product

  53. Norman (verified owner)

    Absolutely awesome one bullet show my full size Glock

  54. Jeremy (verified owner)

    First 200 round through it, various weights, flawless

  55. Andrew C. (verified owner)

    Magguts is the real deal. The parts are very well made and are stylish without being flashy. Will definitely buy again.

  56. Eric E. Holman (verified owner)

  57. Mark (verified owner)

    As described. Haven’t used the new mag rig yet, but the installation went as described

  58. Isaac (verified owner)

    Awesome mag upgrade! Took them out to test reliability and like all mag guts I’ve used before they’re 100%. I trust these more in my EDC than the default springs and follower. Only gripe is the price but they’re well worth it!

  59. Svyatoslav Aistov (verified owner)

    Works great at the range

  60. Anonymous (verified owner)

  61. Kevin T. (verified owner)

    14+1 in a P365X is almost too good to be true!

  62. Melvin m. (verified owner)

    installs really easy and is highly recommend

  63. Shane (verified owner)

    I don’t know why this company isn’t more well known.

    I got the plus 2 for my factory 12 round 365xl mags making them 14 round mags

    The over all length is about 1/16 of an inch longer which makes the perfect size grip for me.

    I wish they sold entire magazines.

    I will buy a factory 15 round magazine when mag guts makes a plus 2 for them.

  64. Jeremy P. (verified owner)

    Easy to install into the magazine. Works great at the range.

  65. Jon Barron (verified owner)

    Why is it that myself and others experienced rattling in the mag

  66. Sean (verified owner)

    Shipping was fast! Installation was quick and it does what it advertises. 14 rounds in my 365XL fed better and loaded better than the stock spring/follower. I’ll buy more for the rest of my magazines!

  67. George (verified owner)

    The Sig365 with an XL frame and magguts +2 makes it the smallest, thinnest, lightest, 14+1 gun on the market.

  68. Joel (verified owner)

    I originally started using MagGuts with my Gen 1 Shield and never had any issues. This new kit for the P365XL works perfectly and it actually fixed a several issues I had with the factory mags. The new baseplate has a slight pinky extension which gives a full grip and the mags are easier to seat since they now protrude just a bit outside the magwell…no more pinched fingers! Also, the factory spring and follower had a tendency to “nose dive” rounds. The MagGuts spring seems to provide stronger feeding while also making it easier to load rounds than the factory one. I don’t know how they managed that, but my thumbs are thankful. Oh yeah, I almost forgot, you get 2 extra rounds…total win!

  69. Alison Rhyne (verified owner)

    These made my 12 round magazine’s into 14 rounders. Functioned perfectly at the range

  70. Jack (verified owner)

    This product works just as advertised and it arrived quickly. Very ingenious design, Thanks

  71. Kelly (verified owner)

    Plus 2 with flawless operation and just the right length, not too short like the stock 12 rd, not too long like the 15. Perfect imo

  72. PETER G. (verified owner)

  73. Benjamin (verified owner)

    Easy switch with no change in concealabity. Was a little skeptical about the follower but have had no issues.

  74. Israel Rozemberg (verified owner)

    The assembly is kind of difficult, but once setup these have worked flawlessly so far.

  75. William (verified owner)

    Awesome!!! 14 rounds in damn near a flush fit!!’ I hope you can do plus 5 for the 15 round mags!

  76. Jason G. (verified owner)

    Very happy with this purchase. Both functioned perfectly in my Sig 365

  77. Ben (verified owner)

    Great quality product, innovative and effective. I would say the price is a bit steep – I think $25 would be a more competitive price.

  78. ROLANDO A. (verified owner)

    Very happy with product will buy more for my p365xL and p365.

  79. steven carrick (verified owner)

  80. Elkeith (verified owner)

    My order came really quick. It was very easy to install and took only 5 minutes.

  81. Darryl Hale (verified owner)

    With the XL grip and this in a 12 round mag I now have a 14+1 P365. The XL grip is great much better grip and the mag fits flush and operates as it should with 14 rounds. Great system guys.

  82. Chris H. (verified owner)

    The base plate wants to slide out at time. I needed to take it off and reinstall at the range.

  83. Carlos Q. (verified owner)

    Extremely Reliable and Innovative!!!

  84. Tim Heath (verified owner)

  85. Myleena O. (verified owner)

    A fantastic product that I’ll definitely be buying more of.

  86. Anonymous (verified owner)

  87. Omar D. (verified owner)

  88. Michael H. (verified owner)

    Wow these mag kits are awesome! Who would have thought you could fit 14 rounds into a mag as small as the p365 from sig, well thanks to magguts you now can and there is no size increase.. simply awesome!
    Thank you Magguts!!

  89. Chris Lamantia (verified owner)

    The ammo rattles when you load the 14th round in the mag but not when you only load 13. Cant stand the rattle

  90. Craig H. (verified owner)

    I don’t usually bother writing reviews… But this +2 kit for the P365XL is just excellent. It is placed squarely at the center of the four way intersection of function, form, ingenuity and durability.

    I’d use this kit for the base plate alone – the pinky shelf along with the rounded heal and side contour make the grip more comfortable in the hand and for carry.

    The mags are now easier to load, especially the last few rounds which were really tough on the factory set up.

    The only downside may be that installation is a bit tricky. One reviewer recommended prefitting the base plate without the spring first and that made it quite a bit easier for sure.

    Some complained about the price – I couldn’t disagree more. I found the kits to be thoughtfully designed and well made. Happy to support American manufacturing business. I bought eight kits to upgrade the entire family fleet.

    Looking forward to the +2 (or +3?) Kit for the 15 round factory mags that now seem pretty clunky next to the MagGuts upgraded 14ers.

  91. William Lockett (verified owner)

  92. Kiwink Turner (verified owner)

    Amazing product!! Fired 250 round out of my purchased system with no performance degradation! Everything stayed tight with no rattle while carrying!! When you gonna have some for The CZ P 10 line or maybe even the 2011 line??

  93. Tho Nguyen (verified owner)

    Easy to install and fast delivery! I love it now I have 14+1 Thank you!!

  94. Anonymous (verified owner)

    Great addition to my Sig P365 XL, new spring can be challenging to install.

  95. Samuel M. (verified owner)

    My initial kit had a defective spring. I contacted MagGuts and they immediately sent me a replacement spring. I installed the kit with the replacement spring and my 12 round magazine now accommodates 14 rounds.

    Excellent customer service, I plan to purchase several other kits from them. I highly recommend this company and it’s products.

  96. James Forehand (verified owner)

    They work as advertised, very happy with the extra 2 rounds

  97. Mike Byerly (verified owner)

    Incredible addition!

  98. Anonymous (verified owner)

    Works exactly as advertised…. even better, the last round loads more easily.

  99. Phillip Stanfill (verified owner)

    Worth every penny

  100. Anonymous (verified owner)

    I bought several of these for my P365X. They worked great. As per what others have suggested, install the base first, without the spring/follower so that any small imperfections from the manufacturing process are removed. It makes installing the base with the spring/follower much easier. Then just remove the base, install the spring/follower, then slide the base back on. Watch out for the edges of the spring. They are rather sharp. Be sure to fully load the magazine and then manually remove the cartridges before trying it in your pistol. The spring/follower needs to be fully “cycled” once so it functions properly. The only suggestion I can think of on how to improve upon this product would be for the spring to be deburred (tumble deburred??) before it was formed and plated. Off of that minor detail, it’s perfect!

  101. David W. (verified owner)

    Great product!

  102. Vlad M. (verified owner)

    Easy to install, works better than original, easier to load.

  103. Larry (verified owner)

  104. Keith (verified owner)

    It not only increases capacity, it greatly reduced the effort needed to fully load the mag. After several mag dumps it operates flawlessly also. My P365X was failing to go completely into battery about twice per mag with the factory mags and this cured that. You guys could teach Sig a thing or two.

  105. Wilson (verified owner)

    So far so good ran about 200 rounds through it, dropping the mag on concrete several times. Loading/unloading is easily performed with your hand…good tension

  106. Robert (verified owner)

    Ordered two + 2 kits for my P365XL. Have a couple hundred rounds thru both mags and have had no issues with either mag. Slide locks open when empty and no failures to feed. Kit was easy to install and it’s nice having 29 rounds at my disposal in such a small package.

  107. Kevin P Tittle (verified owner)

    I am appreciative of the design and the ability to have extra capacity. However, the magazines (which are SIG, OEM, and USA made) were fully loaded or unloaded, there is a pronounced rattle when moving. (I believe it is the main spring slapping around in the body.) When the magazines are in my kydex mag carrier the sound is magnified and reminiscent of dominoes in a tin can. This is not good, considering they are my EDC mags. I like the concept of extra capacity but I believe some review and tweaking of the design need to occur. Idk if anyone else has experienced this issue… but I have contacted customer service, and at this point, their response has been ‘Thank you for the feedback, We’ll look into it.’ I truly hope they will and resolve it. I WANT to believe in this product!

  108. Seth (verified owner)

    Might’ve just been an isolated issue, but the plastic baseplate was too narrow to fit over bottom P365XL 12rd mag. Took me roughly 25-30 attempts to work a groove into plastic enough to slide baseplate into proper placement on mag (significant force was needed to get plate into position). During these 25 attempts the Magguts spring became misaligned & would “fold into itself” inside me mag, causing bullets to pour out of mag. I removed baseplate, reinstalled the spring another 5 times to get spring back into alignment, but same issue persisted every attempt. I emailed their support & they quickly responded, stating that “If it is turned during installation you will have the problem you describe.  Once the spring bends out of shape it will be very difficult to get it right.” Either way, I sent the item back & they are taking care of return. The support team were courteous Folks & I’m bummed this product didn’t work for me.


  109. Fred (verified owner)

    They were little harder to put together than shown in the video.

  110. Justin J. (verified owner)

    Excellent quality. I bought three sets and they are completely identical working flawlessly and there is absolutely no rattle like other magazines can do with aftermarket extensions. Very happy with the added capacity. Definitely recommend.

  111. James Piccone (verified owner)

    Preforms flawlessly and locks in better. The stock 15 round mags are not worth it if you get have 12 round mag +2 Magguts. Literally one round less and almost exactly the same size as stock 12 mag’s. Also now with Magguts it doesn’t feel like the magazine is going to burst at the seams when fully loaded. In my opinion it would be even better if they made the base plate as small as stock.

  112. Marquette Moseley (verified owner)

    I love the product

  113. NEAL WOOD (verified owner)

    Works great on my twelve round 365XL mags. Added bonus, the 14th round is easier to hand load than the 12 round in the stock magazine.

  114. Jason (verified owner)

    Bought 3 for my P365XL. So far they have worked without issue. I’ve run each magazine 5 times, the last two times with a loaded chamber and full magazine. Hoping they’ll continue to work great after the springs have been compressed for extended periods of time.

  115. John W. (verified owner)

  116. Jordan (verified owner)

    This fits beautifully in the 12rd mag and gives you the 14rd capacity without that much added length. I have yet to see if it feeds properly and the longevity of the spring but overall I’m happy with it. If only the mag wasn’t 45 dollars and this kit another 35 dollars making one mag worth 80 dollars I would buy for all my mags.

  117. chris (verified owner)

    Quite a bit more difficult to install than the other p365 variants, but still an amazing product. 14 plus one in a micro compact?! My Glock 19 is now a paper weight. 100% function rating on all 4 of my mag guys P365 mags. Can’t recommend them enough.

  118. Nigel Brown (verified owner)

    I ordered two spring kits for my Sig P365.
    Shipping was really fast and the magazines work perfectly.
    It’s nice to have two extra rounds for my EDC.

  119. Stephen A. (verified owner)

    Haven’t had the opportunity to go to the shooting range yet. But I’m impressed how it works with 2 extra rounds.

  120. Bob (verified owner)

    Excellent +2 mag upgrade. Purchased 2 mags and ran 90 rnds thru them,flawless. Purchased a 3rd mag which remains to be tested.

  121. Britt (verified owner)

    My P365XL now holds 15 rounds without sacrificing concealibility if I were to use the standard Sig 15 rounds magazine. I bought 2. I still need to try them out at the range, but this is a definite game changer.

  122. Roderick Richardson (verified owner)

    Great product haven’t had any problems.

  123. Ken B. (verified owner)

    I have not installed nor used these products but I rated you a “5” because of the ease in ordering and your quick turn around to get them to me in a timely manner. I appreciate that.

  124. Frankie Boan (verified owner)

  125. Lee V. (verified owner)

    Really like it no problem installing it

  126. Anonymous (verified owner)

    Couple hundred rounds ran without failure through p365x.

  127. Charles K. (verified owner)

  128. Jason Brown (verified owner)

    Great Idea. More rounds of freedom. In the factory mags. I have another one coming for my second magazine for my P365XL

  129. Bradlee B. (verified owner)

    Great addition to my carry setup. My only complaint is that it has that darned bullet rattle. I’ve tried everything to get it to go away with no avail.

  130. Derek M. (verified owner)

    Great product. Fit and finish is very nice. Works as it should. Ran 200 Rds at the range without any malfunctions. Highly recommended.

  131. Anonymous (verified owner)

    Work great once I got past the “how-to” video…. the current version of the P365 has a different takedown for the slide than the video (version 1?)

  132. Craig (verified owner)

  133. Charles Mancuso (verified owner)

    Ran about 200 rounds through my magguts magazine and it was perfect. Not one single jam. Love it!

  134. Mark (verified owner)

    Bought 4 all function flawlessly!

  135. Roderick Richardson (verified owner)

    Great item haven’t had any problems yet.

  136. Thomas (verified owner)

    I used the glock 43 kit and it worked, this one just didn’t work. very disappointing.

  137. Joseph Iglesias (verified owner)

    Have not had an opportunity to run it yet, but I am impressed when manually cycling the slide. Can’t wait to test ar the range.

  138. Ricky Taylor (verified owner)

    Great product , works as advertised and easy to install . Only complaint is they are a little pricey . I hope someday they will make one for the fifteen round 365xlmag.

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