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Pro Mag Springfield XD-9 Plus 4 / XD-40 Plus 3 Magazine Extension
$13.99 $11.99 Save 14%
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Most Helpful Positive Review XD magazine base plate/extension
I was skeptical at first due to the mixed reviews but by far impressed. Some will say it only adds one round but i found that if you change the follower to a spring internal in stead of the factory follower that has a piece of plastic down through the spring it frees up for room in the mag when the follower bottoms out. I have 16 total rounds in a factory 10 rd springfield magazine with a aftermarket follower with this base plate. Thats a whole total of 6 rounds with this base plate and aftermarket follower. FFT.
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NOT plus 4 But it works…

by Tony, Verified Owner from CA, United States Written on June 2, 2022
For restricted states(CA) you can add it to oem 10 rd mag and it will NOT increase capacity it’s just for looks but it does look badass, I tried this on a 16 rd oem mag and no matter how hard is pushed and even used a loader I was only able to get plus 2 for a total of 18, some say a adtermarket follower helps but it should mention that before you buy, looks great and badass either way, I have yet to try it at the range and will update when I do
Would recommend: Yes
Was it helpful to you? Yes | No

Money well spent.

by Darryl Scott, Verified Owner from NC, United States Written on November 25, 2020
I love the easy install the extra ammo capacity and the look is straight off of John Wick. My xd9 looks like a lead spitting machine. I ordered to and he'll I should just buy the rest of the inventory because when I say stellar quality I mean its all in the pudding. Get you one or ten. While they last.
Pros:
  • Everything about it
  • Nuff said
Cons:
  • Didn't come with free ammo
Best Used for:
  • Double stack if you carry girth and length
Would recommend: Yes
Was it helpful to you? Yes | No

Great item with one flaw

by jared, from CA, United States Written on August 26, 2019
This was a great pickup at yhe price! Most places are selling for 3x the this price. My only issue is it only added one more to the magazine. I wish it added +4 to my XD-9 but it still gives the the length I needed.
Pros:
  • Price
  • Added length
Cons:
  • False advertising
Best Used for:
  • Added length
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Easy swap, does what it says, great price!

by nowuries, Verified Owner from CO, United States Written on May 9, 2018
For $10, adding an extra 4 rounds to my primary magazine for my XD-9 was a no-brainer, as was the very simple swap from the original base plate. Absolutely no issues; 1 minute of install, and an extra 4 rounds in the hoppa! AWESOME! I can't comment on build quality over time, but it seems robust enough.
Pros:
  • Cheap
  • EASY INSTALL
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.