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CZ 455/457 3 Round Mag Extension

(52 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 mag extention

    Posted by Darrin moore on May 30th 2023

    This is the best product out for easy mag release on kRG Bravo stock

  • CZ455 mag

    Posted by Ed Castro on Mar 24th 2023

    I bought this as a spare mag and it works as expected, I mean it is a factory mag, but what I really want to remark here is the service I always receive from AO folks..I have got a lot of things from them and plan to get many more.

  • 3 extra rounds!

    Posted by theburg2014 on Mar 8th 2023

    It’s nice having 3 extra rounds. Fit & finish is top notch. Installation was a breeze. Watch the video for a gr8 tip that shows you how to get that 13th round if you’re having difficulty.

  • CZ 457 3 round mag extendsion Very pleased

    Posted by Randy on Mar 2nd 2023

    Very pleased, I would buy them again.

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