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GLOCK MODEL 21 45ACP MAGAZINES

20 Reviews
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Summary
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$19.99 - $54.99
Promo codes are not applicable with this product.

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Made In The U.S.A.

Products marked with the Stars and Stripes are proudly made in the U.S.A.

Many customers have asked us to show which products are made in America, and we’ve begun working with our vendors to identify them. This information, however, is not available for all items nor does it imply that foreign merchandise is of lesser quality. We will continue to gather this information to assist our customers in making informed buying decisions, and will keep our website current with the latest information.

Guaranteed. Forever.®

We make purchasing and returning products as simple as possible. If you buy a product from Brownells and decide you don’t need it, don’t want it, or just don’t like it, we’ll take it back any time… with a few exceptions

Exceptions include: 

  • Firearms
  • Ammunition
  • Modified 80% frames & receivers 
  • Gun powder
  • Primers
  • Liquids
  • Limited Quantity/Hazardous items
  • Products that are subject to pending or implemented restrictions due to Federal, State, or Local regulation/legislation

All other products are Guaranteed. Forever.® you can easily identify these products by the Guaranteed. Forever.® Icon.

Guaranteed. Forever.

Guaranteed. Forever.® return policy applies to the product’s original owner along with proof of purchase. Any items returned within 45 days of shipment are entitled to a refund. Any items returned after 45 days of shipment will be issued store credit in the form of a Brownells Gift Card. If a Brownells/Sinclair product was purchased through another retailer as a new product we will require proof of purchase to replace or refund.  (Refund will be issued as store credit in the form of a Brownells gift card.)  

Be confident your Glock® pistol will perform to factory standards each and every time with genuine Glock® factory magazines. Manufactured to Glock® specifications in Austria by Glock®. All models include round count indicator on rear face of magazine body and standard factory baseplate.

These are current Gen 4 Magazines with Ambi Notches For Ambi Mag Releases.


SPECS: Polyethylene body over steel liner. Glock® factory compatible with Gen-4 guns. Also fits G-30, G-41, G21SF where legal.


DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or Glock®Ges.m.b.H. Neither Brownells 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 merely to advertise the sale of Glock®pistols, parts, or components. For genuine GLOCK, Inc. and Glock®Ges.m.b.H. products and parts visit www.Glock®.com.
Specifications

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MODEL 21 45ACP MAGAZINES Reviews
Rating Snapshot
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85%
(17)
5%
(1)
5%
(1)
0%
(0)
5%
(1)
Overall Rating
4.7
20 Reviews
Review Summary
Customers appreciate the quality and reliable performance of the Glock magazines, often noting their perfect fit and functionality. While the shipping experience is generally good, there are mixed feelings about the accuracy of product images. Overall, the magazines are seen as a worthwhile investment at competitive prices.
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20 Reviews
Verified Purchase
January 07, 2025
It works
I was concerned whether they would work with my Gen 1.Guy in tech told me they would.I bought a 3 pack.I’ve tried 2 and they work like a charm.Good product.Good service.
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Verified Purchase
November 02, 2024
OEM Glock 21 Magazines
Great price, fast shipping
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Verified Purchase
April 02, 2024
Great sale price
I received 3 Glock factory magazines in new condition and promptly shipped.I received a sale discount with the purchase.Very happy with my purchase.I have done business with Brownells for many years.Great company.
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Verified Purchase
April 15, 2025
Works
Works great.
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May 14, 2010
Great mags
Functions smooth and reliably like all other Glock mags.Retains spring strength after years of being fully compressed.My G21SF mags rattle a little if fully loaded (out of the gun only) due to rounds not being perfectly aligned with each other but does not degrade functionality in any way.
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Customer Questions
Customer Questions
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7 Questions
H
H
Hugh
January 21, 2025
Do anyone think Glock will make magizanes (more than 13 round) for the Glock 21 ?
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00
C
C
Customer CareCompany Answer
January 28, 2025

Unknown.

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00
N
N
Nathan Dilley
July 09, 2024
Well this fit a G 3, 45, model 21 SF
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00
K
K
kyleCompany Answer
July 10, 2024

these will not work

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13
E
E
Edwin
July 04, 2023
Will this magazine work for a Juggernaut JT-45?
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00
I
I
Isaac W.Company Answer
July 10, 2023

Yes

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00
C
C
Chuck in IT
November 11, 2021
Will this work with a Gen 1 Glock 21
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21
C
C
Customer Care
December 10, 2021

Yes will work in Gen 1.

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00
F
F
Fred
June 09, 2021
Will this mag work in my 21 Polymer80 PF45
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00
C
C
Customer Care
June 10, 2021

Yes

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10
L
L
Larry
June 05, 2019
Will this fit and function in a Glock 21, gen 2 ?
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30
C
C
Customer Care
June 06, 2019

It should work fine. 

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20
R
R
Rick
March 05, 2018
Do they make any other magazines for the Glock 36 besides a 6 round magazine?
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00
C
C
Customer Care
March 28, 2018

No.

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10