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26RD MAGAZINE 45 AUTO FOR GLOCK® 21 Reviews & Ratings

Why should only 9mm Glock® shooters get to double their firepower? KCI’s 26-round Glock® 21 magazine gives you twice the number of rounds of .45 ACP as the standard factory mag. OK, it does stick out more from the magwell, but how much can you complain when precious range time is interrupted less often to change mags? Built to the same specs as your OEM mags, KCI 26-rd Glock® 21 magazine is perfect for competition prep, tactical drills, and other fast shooting applications. Polymer and steel construction (same as factory mags) stands up to rough use, while the tempered chrome silicon spring keeps the round stack moving smoothly and reliably above the polymer follower during those long days at the range.

2x the capacity of original full-cap factory mag
Factory-style polymer body with stainless steel reinforcing sleeve inside
Easy-to-remove baseplate
Handy witness holes
Accepts magazine accessories that fit factory mags

The folks at KCI tell us these Glock®21 magazines might need to be put through several load/unload cycles before they will accept their full 26-round capacity. Try loading a mag to half capacity and leaving overnight to start breaking in the spring and make future loading easier.

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols. “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither KCI USA nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is solely to advertise the sale of aftermarket parts or components compatible with GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H. products and parts, visit www.glock.com

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5 Stars

75%

4 Stars

3 Stars

2 Stars

17%

1 Stars

Reviews Summary

Overall, reviews for the 26RD MAGAZINE 45 AUTO FOR GLOCK® 21 are mixed. Many customers appreciate their durability and price, finding them to be a good alternative to OEM magazines. However, some users experienced issues with loading, tensions, and fitment related to their specific firearms. Overall, they offer good performance for the price, but reliability can be inconsistent.

What Reviewers Are Saying

Product Durability

45%

Numerous reviewers highlight the durability of these magazines, noting that they can withstand regular use over extended periods. However, some users report issues with the spring tension after a few months, which raises concerns about long-term reliability.

Affordability

65%

Many customers mention the excellent price point of these magazines, indicating that they provide good value when compared to OEM options. This affordability is considered a significant advantage for those on a budget.

Performance Issues

40%

Some customers have faced performance issues, specifically with failure to load and needing manual intervention during use. While many users find the mags operate well, inconsistent performance remains a concern for some.

Fit and Compatibility

35%

Reviewers noted varying success regarding fit in different firearms. Some experienced fit issues, while others reported these magazines fitting snugly in their Glock models. This inconsistency can affect user satisfaction.

Positive User Experience

50%

A number of customers express overall satisfaction with the magazines, describing them as a good alternative and praising their operation under typical conditions. The positives largely resonate with those who are open to non-OEM products.

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Glock Mags 26 rds

These mags are hard to find and the price was excellent. Love you guys!

by DAVID RAIRDAN on August 21, 2025

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GOOD VALUE

THESE ARE GOOD QUALITY MAGS FOR THE PRICE AND WORTH THE PURCHASE.

by RICH KARBY on May 05, 2024

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.45 ACP mag

Doesn’t fit. Could be the Cerakot on the receiver. No worries, I come across this from time to time. Looks good.

by PETER ZAMORA on November 07, 2023

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Better than Glock mag brand

Better than the Glock brand

by JOSH EDGELL on August 08, 2023

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Was this review helpful? 2

Awesome

I inserted this on a Glock 21 and 30. I shot approximately 200 rounds each weapon of 45 cal. I had no problems. Works as described. I purchased five of them. I plan to buy more.

Excellent !!!!!!!!!!!!

Absolutely sensational !!!!!!!!! Great !!!!!!!!!! Perfect !!!!!!!!!!!!

Survives loaded drops/good mag well fi

I felt like a fumbling idiot at the range having dropped several of these 26 rounders on the concrete. I was so used to the weight of the 13 rounders that I miscalculated the force to pick these mags up when doing quick reloads. Sent several of these 26 rounders to the floor but all survived and operated flawlessly. Good fit in the well of the Glock 21. First load on a couple of the magazines was tight getting the 25th and 26th rounds in, but the next loads were much easier. No feed issues first use nor with the third or fourth. Buy these for the quality and price if you cant afford Glock OEM.

Works everywhere

These mags work dependably in my Glock pistols and also my CMMG 45 carbine at less than 1/2 the cost of OEM mags.

Very good product just like glock

Made just like glock mags in every way not I just need some range time

Springs get weak

I bought This brand and have about 8 and they held out for a long while like a couple years or more fully loaded and recently I had a failure to load at the range and was told not to use them anymore. The factory Glock mags only have 13 rounds and I can See why. Glock figured out that more than 13 for the .45 cal would have issues with the spring.