Glock 21 13-Round Magazine
The Glock 21 13-Round Magazine is a factory OEM replacement mag chambered in .45 ACP for the full-size Glock 21, 21SF, and Glock 41 pistols. It uses Glock's proven steel-lined polymer construction with a high-tensile steel spring, polymer follower, and numbered witness holes for fast round-count checks. The flat polymer base plate keeps the profile clean while the full 13-round stack puts serious big-bore capacity in the gun. Cross-compatible across Gen 2 through Gen 5 frames, it's the right pick for range work, duty carry, or building a reliable spare-mag rotation for your .45 ACP Glock.
In stock
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- SKU
- MF21013
$30.86
Description
Features
- 13-Round .45 ACP Capacity — Standard full-size factory capacity delivers 13 rounds of big-bore .45 ACP on tap.
- Glock Factory OEM — Genuine Glock-manufactured magazine built to the same spec as the one shipped with your pistol.
- Steel-Lined Polymer Body — Crack-resistant polymer shell with full-length internal steel inserts for long-term durability and reliable lip geometry.
- Multi-Platform Fit — Drops into the Glock 21, 21SF, and 41 across Gen 2, Gen 3, Gen 4, and Gen 5 frames.
- Numbered Witness Holes — Side cutouts let you quickly verify round count without disassembling the magazine.
- High-Tensile Steel Spring — Heavy-duty spring wire maintains consistent feed pressure from the first round to the thirteenth.
- Polymer Follower — Smooth-running follower keeps rounds tracking straight into the chamber under hard use.
- Flat Polymer Base Plate — Low-profile flat floorplate seats flush with the magwell for clean carry and storage.
- Made in Austria — Manufactured to Glock's original factory tolerances for guaranteed fit and function.
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Customer Reviews
Top customer reviews
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Stock up on these while you canBought 3 of these for my Glock 21. All three function flawlessly. I always stick with OEM mags for my carry guns, aftermarket ones have let me down too many times. These are the real deal and the price was fair.
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THIS IS A GREAT PRODUCT.This is a great product. Flawless performance. Keepshooting offers them at competitive prices!
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Gen 4 Glock MagProduct is as described. Reliable Gen 4 mag for .45acp Glock 21 at a great price.
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