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The standard 13-round Glock 21 magazine gets the job done, but there's a reason people are always looking for more capacity in .45 ACP. KCI USA's 26-round extended magazine for the Glock 21, 30, and 41 gives you nearly double the rounds before a reload, making it a popular pick for range sessions, competition, and home defense setups.
Construction follows the same general formula as genuine Glock mags: a hardened steel insert fully encased in polymer. The polymer shell protects the body from the kind of dings, drops, and rough handling that happen during regular use, while the steel liner keeps the feed lips and internal geometry where they need to be. The spring is made from heat-treated chrome silicon wire, which holds tension well over time and contributes to consistent feeding. There's also a removable baseplate for straightforward cleaning and maintenance.
Compatibility covers the Glock 21, 21SF, 30, 30S, 30SF, and 41, all chambered in .45 ACP. One note worth knowing: this magazine will not fit the Glock 21SF with an ambidextrous magazine release due to the geometry of the extended body. If your 21SF has the ambi release, double-check before ordering.
Like most extended magazines fresh out of the box, the spring can be stiff at first. Loading it to half capacity and letting it sit overnight before the first full load is a good habit that'll make things easier going forward. A magazine loader never hurts either. KCI USA backs all of their magazines with a limited lifetime warranty against manufacturing defects, which adds some peace of mind at this price point.
This magazine is compatible with the Glock 21, 21SF, 30, 30S, 30SF, and 41, all chambered in .45 ACP. One exception to be aware of: it will not fit the Glock 21SF configured with an ambidextrous magazine release. If your 21SF has the standard release setup, you're good to go.
Yes, that's pretty normal with any extended magazine right out of the box, especially at 26 rounds of .45 ACP. Loading it to about half capacity and letting it sit overnight before your first range trip helps break the spring in and makes topping it off much easier going forward. A cheap magazine loader will also save you some frustration.
KCI uses the same basic construction approach as genuine Glock mags, with a hardened steel insert encased in polymer and a heat-treated chrome silicon wire spring. For range use and training, most people find them to be solid performers. They're not going to have the same fit and finish as an OEM Glock mag, but they function reliably and hold up well with normal use.
KCI USA backs this magazine with a limited lifetime warranty covering manufacturing defects. The warranty doesn't cover damage from misuse, improper loading, or incompatible firearms. If something goes wrong that's clearly a defect in materials or workmanship, KCI will repair or replace it at their discretion.
It's designed and tested for Glock pistols, and results in PCC and AR-45 platforms can vary depending on the specific build and its magazine well tolerances. Some users have had success, while others have needed minor modifications to get reliable function. For pistol use in the listed Glock models, it's straightforward.
| UPC | 851586008207 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | KCI-MZ013 |
| Caliber/Gauge | .45 ACP |
| Capacity | 26 |
| Color | Black |
| Length | 10.1500 |
| Model | |
| Product Type | Magazine |
| Quantity | 1 |
| Shipping Weight | 0.36 |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (OR) | NO SALE TO OREGON |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
| Units per Box | 1 |
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