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CZ 455/457 3 Round Mag Extension

(60 reviews) Write a Review


Increase Shooting Capacity With the CZ 455/457 Mag Extension

Whether you are going on a hunt, competing, or just having a little fun on the range, having extra ammo is always a good thing. Increase your CZ 455/457 mag capacity by three rounds with Anarchy Outdoors's extended mag.

The meticulous USA design and manufacture of this mag extension shines through with the ease of installation. Just remove the mag base plate and slide on the mag extension. Watch our installation video for step by step directions.


Note: These are only compatible with the 10 round magazines. They will not work properly on the 5 round magazines. Similarly these extensions are not compatible with the 17 HMR or the 22 WMR.


At Anarchy Outdoors, we pride ourselves in our ability to deliver high-quality, precision, and cutting-edge gear for firearm enthusiasts. All Anarchy Outdoors’ developed products come with a lifetime replacement guarantee.



Made in the USA

Customer Reviews

  • 3 round extension

    Posted by JW Schroeder on Sep 21st 2023

    It took me a couple tries to get the follower spring to seat properly. I made the mistake of opening the slide again and “thought” I had the plunger/stop handled, but it came off the spring and disappeared?! Using a paper clip until I find a solution. Waiting to hear from supplier if they can help. Works all 13 rounds just fine.

  • Magazine extension.

    Posted by Mastiff1 on Sep 9th 2023

    Functions well! Reasonable price.

  • Works with CZ steel Mags

    Posted by Jon on Aug 28th 2023

    The Q&A states not compatible but in fact does work very well on my steel mags I ordered direct from CZ.

  • CZ magazine extension

    Posted by Gary on Aug 22nd 2023

    Put it together, to it out and it has functioned flawlessly. A little stiff to load the first time but has never failed to operate.

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