MagGuts +2 Conversion for Sig P365 X/XL 15 Round Magazine

(136 customer reviews)


This conversion reliably turns your Sig P365 15 round magazine into a 17 round magazine specifically tailored for the X and XL models.  The spring, follower, and base are replaced with MagGuts™ components while the magazine housing is reused. There is also a sleeve provided that matches the X/XL grip module perfectly. After installation, the sleeve is fixed onto the magazine housing and does not move. The converted magazine works in all versions of the P365 (standard, X/XL, and Macro) but mag sleeve included was designed for X/XL version. When used with the standard (not X or XL) P365 model there will be a gap between the mag sleeve and the grip. If used in a Macro, the sleeve is not used and there will be a gap between the base and the grip.
With this conversion you will get:

  • Reliable feed and slide lock
  • +2 capacity increase with negligible length change
  • Easy to load
  • Great fit and feel with grip matching texture on sleeve.
  • Highest quality spring and component materials used.
  • Cutting edge magazine technology [patented]

Sleeve included for the X/XL grip modules only.

This item is not available for shipment to California.

SKU: CVN045 Categories: , Tags: , ,

136 reviews for MagGuts +2 Conversion for Sig P365 X/XL 15 Round Magazine

  1. Anonymous (verified owner)

    Work great, good upgrade!

  2. Anonymous (verified owner)

    To be honest, I have not yet installed / tested this… But I have full faith, as I have the 10 (to 12) and 12 (to 14) magguts installed in my P365/P365XL mags. Hence, I have no doubts about this 15 (to 17) version.

    Only down side is the damn price of Sig magazines, plus this, turns into $80+ each mag lol.

  3. Francisco S. (verified owner)

    This kit is somewhat more difficult to install than the 12+2 kit. The spring seems stiffer, which plays a role in the difficulty when trying to “accordion” the spring into the Magazine. Haven’t had a range session yet to test functionality.
    Other than that seems like a great addition of 2 rounds for virtually no added footprint to your mag. The baseplate design is also nice with 2 ledges on the side to be able to effectively feel and grab mag on mag changes.

  4. Glen (verified owner)

  5. Mitchell (verified owner)

    A bit tough to install. A few band-aids later, works exactly as advertised. Tremendous product.

  6. Jaime (verified owner)

    Great love my pluss 2 Maggut kit

  7. Ian Cadwalader (verified owner)

    A little tough to install, but that’s just because the springs are so high grade. The first couple times you load the mags will be difficult, use a mag loader. They function flawlessly, and add two rounds as advertised. You’re an idiot if you don’t buy these kits.

  8. Anonymous (verified owner)

    Hold open works flawlessly, only about 200 rounds so far but no malfunctions yet. Very satisfied

  9. Anonymous (verified owner)

    Nothing else to say! Works perfectly, buy one for every magazine you have.
    Simple, buy MagGuts, you won’t be disappointed.

  10. Anonymous (verified owner)

    Shipped quickly, works great!

  11. James Amram (verified owner)

  12. Kevin Allred (verified owner)

    Works perfect 17 rounds in a 365x wow

  13. Anonymous (verified owner)

    Work great!

  14. Ed C. (verified owner)

  15. Jarrod H. (verified owner)

    I love these +2 mag products. I have every variety for the P365 and they all work great. Shipping is also very fast.

  16. William D. (verified owner)

    Works great.
    Place the magazine gently in a vice to ease assembly.

  17. Colton Squires (verified owner)

    Didn’t work. Waiting for replacement springs to be sent.

  18. Christian P. (verified owner)

    Simple installation and functions 100%.

  19. Luis O. (verified owner)

    Fast processing and shipping

  20. Matthew Swertfager. (verified owner)

    No issues so far. Easy to install and seems to be working great!!!!

  21. Anonymous (verified owner)

    Good product, terrible timing. I’ve inquired and waited on this for over a year and you waited to release them after Sig already made them obsolete with 17rd mags of the same dimensions. You should be releasing +2 for the new 17rd mags, not these. It could understand if it was a niche gun, but it’s the most popular carry gun on the market. Yall are really missing out on the $$$.

  22. Eric Evans (verified owner)

    I’ve used the plus 2 on my 12rd mags for over a year without any issue so I expect the same from these. I’ll be taking them out to test this week. The one downside to these guts is the spring is VERY tight starting out so its somewhat troublesome installing them. That said once completely installed, with a loader, the rounds go in and no rattle is noticeable. Which has been an issue with stock SIG mags. All in all I’m happy so far with these guts.

  23. Paul (verified owner)

    Excellent upgrade and functions perfectly. 17rds in a P365XL is a nice cushion. Magguts…..offer discounts! Do that and I’ll upgrade every Sig mag I have! Also, when are we getting a 2rd upgrade for the P365 Macro??

  24. KEVIN WALTHER (verified owner)

    I have several mag extensions. Unfortunately, I was unable to install the P365 kits as easily as the others and had to send it to MagGuts to have them do the work. I’m sure once completed, it’ll work as designed.

  25. Anonymous (verified owner)

    They did such a good job on this project that I prefer to carry this setup over a factory macro in an xl frame. A++

  26. DAVID M. (verified owner)

    I have used many different Magguts products over the years . The conversion units works great once installed. The first installation is a little tough, but once the new spring has been installed and used, it’s no so hard to reinstall after cleaning. A vise or a third hand helps!

  27. Salvatore (verified owner)

    Amazing product! Just like the other two kits magguts makes for the Sig p365 this works flawlessly with no Fail to feed, eject or any other malfunctions. This like the other two only adds a ever slight addition in bottom length of base pad which is not noticeable if you’re not looking for that.

  28. Stephen R. (verified owner)

    I’ve put magguts in several sig p365 10 rd and 12 rd mags, and I must say the 15 rd mag was not easy. I almost gave up. The spring leafs can flip on end inside the housing. When that happens, the spring assembly gets out of shape and has to be straightened out before trying again. Finally went real slow and kept adjusting the pressure will compressing the spring to keep it straight. Loaded with 17 rds, no issues. Haven’t been to the range yet, but my other mags with magguts work flawless. Expect the same.

  29. Anonymous (verified owner)

  30. Robert W. (verified owner)

    Difficult to install spring but well worth it. Works well and increases capacity to 17+1.

  31. Kevin D. (verified owner)

    Great product but very hard to install

  32. Anonymous (verified owner)

    It’s very neat these products of you guys, i put anonymous cuz i dont Like share my
    Information. Id like if you guys come with these available in another firearms as well. Thanks guy

  33. Lee H. (verified owner)

    Excellent, well designed product, small challenge to install but once done it works like a champ. This kit now converts my 15rd XL mag into equivalent x-macro 17 rd mag I can use on my P365XL.

  34. David G. (verified owner)

    Awesome product, just like everything else from MagGuts. And half the price of 17 round macro mags.

  35. Jerry Hunt (verified owner)

    I’ve bought magguts before they work really well never any issues. I thought shipping was slow but it was Christmas time. I was well pleased with service and product.

  36. Jesse Cunningham (verified owner)

    I have a Sig P365XL. Iv used MagGuts 2rd kits in my 15 (17rd) and 12rd (14rd) mags. All function flawlessly. I have not seen any malfunctions posted on the forums either. Made in USA.

  37. Anonymous (verified owner)

    Pleasantly surprised, the tension is consistent throughout loading. Excellent fit and finish compaired to OEM (no corners).

  38. Craig P. (verified owner)

    Great way to improve the number of rounds without spending the extra money buying a new magazine if/when magazines are available. Reliability and affordability makes this hard to beat. Bonus is that it doesn’t add much length to the magazine and looks great too.

  39. Thomas Leavitt (verified owner)

    i broke the spring off the follower while trying to assemble ,had good luck with the 12 round conversion

  40. George Albrecht (verified owner)

  41. Anonymous (verified owner)

  42. Andrew R. (verified owner)

    I felt it was irresponsible of me to consider spending $850 + for the P365 Macro just to have 17 rounds. I don’t care for compensates. My P365 XL shoots just fine. So for $33 I can have MagGuts which accomplished the 17 round wish!! Great job guys.

  43. Kent K. (verified owner)

    One of the smartest upgrades in firearm magazine history in my opinion. Recommend to everyone!

  44. Bryan (verified owner)

    After getting the 12+2 conversion and it working flawlessly, I ordered the 15+2 as soon as they were available. I haven’t taken to the range, but expect them to work the same (otherwise I wouldn’t have ordered). Followed the installation instructions and these now allow the stock P365 mags to hold 17. 17 + 1 for my P365X is pretty amazing for such a small pistol.

  45. Doy E Noblitt (verified owner)

    So far everything from your company has worked great. P365 10 to 12s, 12s to 14, and now 15 to 17. Thx!!

  46. Antonio S. (verified owner)

    I wasn’t really expecting any problems with this product since I already have a few of their magazine upgrades . I had a bit of an issue with installation of 17 rd flat spring on first attempt, but emailed Magguts and received a really quick response. They emailed me link to installation video that was helpful. I installed it in about 5 minutes on second attempt. Just fired 200 rounds with 4 different kinds of ammo without one single issue . Will definitely purchase a few more !

  47. Jeff C. (verified owner)

    Great product. Add two more rounds without adding anything to the size.

  48. cliff scott (verified owner)

  49. Anonymous (verified owner)

    These are awesome. Every mag should have them.

  50. Michael G. (verified owner)

    Holds 17 rounds, the last round is a bit snug, but not as tight as the 15th round in the original 15 round magazine. After converting my first magazine, the other three went together easily. I am planning on converting my other 6 P365 magazines.

  51. Franklin (verified owner)

    Easy install. Ships fast. Ran other Magguts in my other mags and they have been flawless so far.

  52. Anonymous (verified owner)

  53. Theodore (verified owner)

    Functions perfectly and is easy to install!

  54. Anonymous (verified owner)

    Awful and doesn’t work. Bottom 1/3 of spring gets thinner leading to issues getting the spring to compress and sit/fold properly. Watched videos and followed instructions which did nothing to help.With a ridiculous return policy, not even worth the hassle of returning. Waste of money.

  55. Paul H. (verified owner)

  56. Randy S. (verified owner)

    A little difficult to install but good as always

  57. PAUL M. (verified owner)

    I have purchased several of these products with a thumbs up. This new offering not so much. The spring simply was too long and did not seat properly. I ended up bending it and trashing it.

  58. Charles R. (verified owner)

    The MagGuts +2 conversion for the P365XL 12 round magazine, does in fact allow two additional rounds in each magazine. The conversion is more difficult than it would seem…the follower has an attached spring that seems to be more of a guide for the folded MagGuts spring. The attached point of the “guide” results in a bump that is prone to catching the top fold of the main spring. This catch point is mentioned as a precaution in the assembly instructions. If the folded spring end catches the bump, things don’t work as they should. It would seem that bump could be trimmed so as to not catch the top fold, or the leading edge of the top fold could be chamfered or rounded to prevent catching.

  59. Anonymous (verified owner)

    Why keep looking for a sold out macro mag, this one works even better.

  60. Jose C. (verified owner)

    before with the original spring it was impossible to load the 15 rounds, now with the magguts conversion I can load 15 rounds but not 17.

  61. Robert Calhoun (verified owner)

    This work great so far. I haven’t had a chance to going shooting yet. Easy to in stall once I got it started. Will be buying some more.

  62. JAMES QUROLLO (verified owner)

    Does what it says. The physical act of installing the new guts to the 15-round Sig P365X magazine is fairly difficult though and should be done very carefully to avoid hand injury.

  63. Rick A. (verified owner)

    works good easy to install

  64. David Morales (verified owner)

    Wish I could upload a video of all three! The 10 to 12. The 12 to 14, and the 15 to 17! All with a round in chamber making them: 13, 15 and 18! All fired FLAWLESS! Thank YOU!!!

  65. Kertis P. (verified owner)

    This is the best way to get a 17-round capacity for your P365XL. Shortly after I installed these, I got ahold of a Sig 17-round magazine for the P365XL Macro. Even though the Sig magazine comes with adapters to allow its use with the P365XL, there really is no comparison as far as fit and utility. The MagGuts +2 kit is hands-down better. Incidentally, I have the MagGuts +2 kits for both the 10-round magazines for the P365 and the 12-round magazines for the P365XL. Both of those work perfectly, which is why I purchased the +2 kit to turn the Sig 15-round magazine into a 17-round magazine. If they had the ability to upload a photo, I would show you the difference between the two 17-round options.

  66. Anonymous (verified owner)

    Adds the +2 like advertised and I love it cause it saved me some
    Money at the time. Haven’t shot it yet unfortunately, but lol forward to it and if it’s like the product for the 12 rd magazine, it should work fine.

  67. Tim (verified owner)

  68. Anonymous (verified owner)

    Has worked well so far, no issues. Installation pretty easy. Does not add additional length to the magazine.

  69. patrick p. (verified owner)

  70. Gary Moore (verified owner)

    Was a bit to get the spring in the magazine on this one for it was easy on the 12+ 2 version. But did find a way to get it done. The warning of the edges being sharp are correct but even with that I found these to be excellent and function without any bit of issue. I highly recommend them for the Sig 365XL pistol and plan on getting some more as some as I can find the magazines!

  71. Tehran L. (verified owner)

    I struggled to keep the spring straight but once I got it it runs like butter .

  72. Chad D. (verified owner)

    Works perfectly fine, 1 thing I think they got rite is the fact that the base plate and the grip extension lock into each other, they are 2 separate pieces. This way the grip extension doesn’t slide everywhere and you don’t need 2 different base pads like sig made us use.

  73. Joshua Johnson (verified owner)

  74. Robert Calhoun (verified owner)

    I bought 4 of these because it less than buying a 17rd magazine.

  75. Samer Z. (verified owner)

    Works beautifully

  76. John F. (verified owner)

    Great products worked well after installation, lube, & a few mags run through! Would buy again, but hope it’ll be less expensive next time.

  77. Robert Calhoun (verified owner)

    These are great. So far I’ve bought four and plan on buying two more.

  78. Michael P. (verified owner)

    These work excellent, I have installed 6 of them and they run great!

  79. Enrique Valdez (verified owner)

    I love the extra two rounds however installing the Z-spring on the 15round magazine making it a 17 rounder was definitely a challenge

  80. Matt Alvarez (verified owner)

    The end result is fantastic, I love having the product installed. Reason it is 4 of 5 and not 5: installation is the absolute worst process. Extremely difficult to get these sobs in the mag correctly. I did two mags and it took me ~90 minutes total. Overall great product that you should buy, just be ready for a tough install.

  81. Michael S. (verified owner)

    Great product and support is great as well.

  82. Michael N. (verified owner)

    I ordered a bunch of conversions for my 365s. My order was one kit short and MagGuts handled it right away. The 10 and 12 round kits were a breeze to install. The 15 was a struggle until I watched a YouTube vid and then it went right together. I have already recommended MagGuts to friends.

  83. Robert Calhoun (verified owner)

    This are great. I bought these to get two more rounds in the magazines. I bought the p365xl frame to change the grip of the p365.

  84. Kevin D. (verified owner)

    This is the second 15+2 I have ordered, much easier to install the second time doing it

  85. George Georgiev (verified owner)


  86. Anonymous (verified owner)

    Super fast shipping! Everything works as described! Very happy customer!

  87. Edward W. (verified owner)

    I’ve purchased magguts +2s for my P365 10rnd, 12rnd and 15rnd mags, as well as my S&W Shield Plus 10rnd and 13rnd mags. They all have worked flawlessly through hundreds of rounds, except the 15 rnd mags I have not had a chance to shoot yet. One gripe and one suggestion…the gripe: the +2 for the P365 15rnd mag should also come with a sleeve for the standard P365, not just the XL.
    The suggestion: make a +2 (or 3!) for the 17rnd P365 XMacro mag. A 20rnd XMacro would be AWESOME!

  88. Anonymous (verified owner)

    Can no longer purchase mags over 10 rounds here under the rule of our Manevolent King Inslee and Sideshow Bob, so getting the new Sig 17 rounders are (legally speaking) out of the question. However as my current 15 round mags are grandfathered in, I can just mod them for the extra 2.

    Seriously though, I have now purchased 6 total +2 kits from magguts, 2×10+2, 2×12+2, and 2×15+2, haven’t had any issues with a single one and use them in my EDC.

  89. Anthony Adams (verified owner)

    You guys should make on for the 17 round macro mag

  90. Jon (verified owner)

    Perfect. Install was easy. Just take your time and keep good pressure on the spring. Helps to pre-fit the base plate once or twice before installing the spring.

  91. Cody S. (verified owner)

    I converted two of my mags and have ran 400 rounds through those 2 mags only. So far they have worked flawlessly.

  92. Josh W. (verified owner)

    In short, it does exactly what they say and performs flawlessly. Install isn’t as easy as a stock setup but by no means difficult. Worth it for a EDC!

  93. Anonymous (verified owner)


  94. Alex (verified owner)

    Easy to install. Watched a YouTube video first for a few tips. Also looked at included instructions which helps verify it’s installed properly.

  95. James (verified owner)

  96. Troy W. (verified owner)

    The spring was extremely difficult to get into the mag, would bend and have to be reshaped and almost cut my hands several times.

    I’m disappointed there is no adapter sleeve for the 10 round grip. I knew the sleeve only came for the 12 round grip when I purchased the item. I have the 10-12 round and 12-14 round guts and am thrilled with them.

  97. Brandon (verified owner)

    Placed my order and it came in a timely manner; however, there were parts missing. I alerted them to the error, and they fixed it. A good test of customer service and they passed, but -1 star for messing up in the first place.

  98. Richard W. (verified owner)

    Easy to use , functions as it should just as my previous purchases

  99. Anonymous (verified owner)

  100. William Kinman (verified owner)

  101. Anonymous (verified owner)

    As allways, excellent customer service and products

  102. Robert (verified owner)

    Haven’t tried them at the range yet but hand cycled both of them and they fed fine. Took a couple of tries to get them installed correctly but I was successful. Do wish they had a floorplate that matched up with the standard P365 without leaving the gap but they are my reloads, not my carry in the pistol.

  103. Robert Schaefer (verified owner)

    Excellent. I would take this not only for the extra ammo but for the end plate that makes the stock 15-round magazine look not so stupid.

  104. Mike (verified owner)

    It works like a charm. Great invention y’all. Not a perfect fit for the standard size p365 with a bit of a gap between top of mag base and base of the pistol grip. A sleeve or longer mag base for the standard size p365 would be nice. This did not affect functionality.

  105. Julius S. (verified owner)

    Great product at a good price. Easy to order & shipped fast. I will be ordering more in the future.

  106. RICHARD T. (verified owner)

    Yep, Yep. from 15rounds to 17 rounds…turned my 365XL into a 365Macro without the $800 price tag. Well, close anyway

  107. Anonymous (verified owner)

    Works great – could be even better if the spring would be attached to the follower.

  108. Edwin J Daroca (verified owner)

  109. Jeffrey C. (verified owner)

    Amazing product. Well worth the value for the price. Fantastic customer service and unbelievably fast shipping.

  110. Wesley Bellinger (verified owner)

    3rd time with a Mag Guts product. Everything has functioned perfectly with better than factory fit and finish. Waiting for the Macro guts to be developed.

  111. ROBERT BYRNES (verified owner)

    I thought I was purchasing 12+2 kits but I had 15rnd mags. Everything installed easily and work wonderfully. Will continue to purchase and use your products. As well as recommend them to others. Thank you

  112. Mark Keyes (verified owner)

  113. Lewis M. (verified owner)

    Great product

  114. Anonymous (verified owner)

    picked this up after upgrading my 12rd magazines. not impressed. i bought 3 and could only get one on that looks damaged now because of how long it took. feels negligent that they don’t advise to wear gloves when installing this thing because it turns your magazine into spring-loaded razor blades. sliced open both hands.

  115. Peter J. (verified owner)

  116. George (verified owner)

  117. Heath C. (verified owner)

    I was never able to get the follower to sit properly and had the hardest time trying to set the spring in place. So, after an hour, just gave up.

  118. Theodore (verified owner)


  119. John F. (verified owner)

    Quality product and easy to assemble.

  120. craig hagen (verified owner)

  121. Rick (verified owner)

    Absolutely love my mag kits… and Customer service is outstanding

  122. Jody E. (verified owner)

    Quality product! Easy to install and I highly recommend installing these on all your mags!

  123. Whitney B. (verified owner)

    18 rounds only P365!!

  124. James Costello (verified owner)

  125. Al (verified owner)

    5 star product and trans action in every regard.

  126. Al Lovitz (verified owner)

    I ordered this kit by mistake. I wanted the 12-round kit. I will ship the 15-round kit back in exchange for a 12-round kit.

    I’ve ordered 2 12-round mag kits previously and the service was great with shipping the same day.

    If recommend Magguts to anyone wanting more ammo in their guns.

  127. David Graham (verified owner)

    Great products, great company

  128. Aaron (verified owner)

    Short version: if it’s not working you installed them wrong. They are very reliable and work very well with Tactical Development base plates (the ones for mag guts), Wilson Combat grips, and the Katana mag well. The 12 plus two needs worked on to fit with the accessories but the 15 plus two is ready to go.

    This is my 5th mag guts and every one is awesome! I always have to read the instructions to get things installed right but it really is so simple to install. I am always putting the lip off the bottom of the spring in funny so it’s worth the 10 seconds to read and follow the instructions. I use the Tactical Development pro ledge base plates (for mag guts) on my 14 round magazines (12 with plus two) and they really provide a more refined finish to the magazine. The cost adds up and we are looking at a 100 dollar magazine now but for me and my thought processes are that it’s worth those extra two rounds.

    I installed the Katana mag well on my Wilson Combat grip and had to Dremel of some of the edges from my Tactical Development base plate so they would fit. The mag guts base plates fit right in with the Katana. The 15 plus two we perfect but the 12 plus two kinda got buried in that mag well: that’s why I altered my Tactical Development ones.

  129. Anonymous (verified owner)

    Works as advertised. Feels better than oem

  130. Anonymous (verified owner)

    A bit more difficult to get into the tube than the Standard version.

  131. Verified Buyer (verified owner)

    It works great, minor difficulty installing

  132. Angelo L. (verified owner)

    Arrived in less than a week. Have one now for the 12 round and the 15 round mags in my P365 XL. Have approximately 500 round through the 12 round mag with no issues, am very confident the 15 round mag will work as well. Great product very easy to install and reliable. A big thumbs up.

  133. William C. (verified owner)

  134. Nathan (verified owner)

    A little bit harder to convert than the 12 round one but still manageable. Honestly I think it can be a +3 but im no engineer, if it was an option that would be awesome!

  135. Anonymous (verified owner)

    I had some issues with this extension but mag-guts customer service resolved the issue the same day.

  136. Pedro (verified owner)

    I purchased a few 12+2 mag kits a few years back and they’ve been reliable. Quality is good and loading is easier especially loading the last round into the magazine. Hopefully we see a mag spring kit for the x-macro in the future.

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