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Tyrant CNC H&K VP9/VP40/P30, +5 Rounds Magazine Extension
As Low As $35.96 Save Up to 12%
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Most Helpful Negative Review Spring and follower would bind up at 16-17 rounds.
Broke before I could get it to work. Tried every configuration i was able to try. Tried the included spring, new/old oem springs, with/without the plastic oem piece in the bottom. New/old 15rnd mags. The retention pin on the baseplate got worn just from me taking it off and putting on trying to make it work so it wont even stay on even it i get it to work. Paper weight as it is right now. Tyrant still hasnt emailed me back after asking for photos and information about my gun build. Didnt work for me at all.
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H&K VP9/40 MAG. Extension

by Shooter, Verified Owner from IN, United States Written on November 14, 2025
Bought 2 but need one more. Both installed in in less than 2 minutes with zero problems. Both ran flawless so much that I ran them in a competition right after I got them. I'm running the VP40 and put over 100 rounds with not any mag related issues. Will be ordering one more soon and then for all additional mags l pickup.
Pros:
  • They worked
Cons:
  • None
Best Used for:
  • More love down range
Would recommend: Yes
Was it helpful to you? Yes | No

garbage don’t waste your money

by Little Scooter, from MS, United States Written on June 23, 2025
I bought four of these for my VP9 and tried 20 different ways and after 16 or 17 rounds the magazine will bind up on every one come to find out it only works on 15 round mags all of mine are 17 rounds and everyone keeps saying the old 15rd so I guess it won’t work on a new 15rd I don’t know what the difference is but one thing I do know just spend the money and buy the ones already put together or better yet spend the buck and get 20rd stock mags they have never given me any issues
Would recommend: No
Was it helpful to you? Yes | No

VP9 +5 extension.

by Jorge, Verified Owner from TX, United States Written on April 11, 2025
Good +5 extension for the VP9. Easy to install if you understand the product. I tried to install the extension with the 17rd red follower magazine like the instructional video and it did not work. The spring kept binding up in this configuration. After a few emails. back and forth with Tyrant CNC, I realized that this was meant to be used on the old 15rd magazines. These extensions would basically give you better looking 20rd magazines compared to the original HK 20rd magazines.

Is this magazine extension better than just buying a HK 20rd magazine? No. If you have a bunch of old 15rd magazines that need upgrading, then I would say it is worth it.

Installation tip: Only use the follower with the included spring for the full 20rds. The locking tab at the bottom of the magazine does not fit inside the extension without trimming and if you decide to use it, the spring is maxed out and makes inserting magazine impossible.

As far as compatibility, it did not seat in a P30 easily. I had to really slam it in, and the mag release is under tension the whole time. If you trim the P30 frame a little it will work, but id rather not trim my pistol and get oem 20rd magazines instead.
Would recommend: Yes
Was it helpful to you? Yes | No

mag base 5-3

by pewbang, Verified Owner from TX, United States Written on February 15, 2025
I recommend for ease of installation. Quality of item very good. Literally took 3 minutes to install. With that said however I am only able to get an additional 2 rounds in the mag. It may be that the spring needs to be broke in a bit before I can fit the other 3 rounds? Time will tell. I’m still happy with the product as my mag baseplate was worn out and needed replacing.
Pros:
  • good quality & fit
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Great design...

by David, Verified Owner from CA, United States Written on February 11, 2025
Awesome design and quality. It's very easy to remove for mag cleaning. Although aluminum, they have some weight, which I appreciate being a competitive shooter.
Would recommend: Yes
Was it helpful to you? Yes | No
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