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(13 customer reviews)

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The PMAG 21 GL9 is a 21-round Glock 9mm handgun magazine featuring a new proprietary all-polymer construction for flawless reliability and durability over thousands of rounds. Meeting the overall length requirements for a 140MM competition magazine, the PMAG 21 GL9 offers additional capacity without the need for expensive extensions.

High visibility controlled-tilt follower, stainless steel spring, easily removable floorplate for cleaning, paint pen dot matrix for mag marking, ridged floorplate edges for better grip, and capacity indicator windows. Drops free loaded or unloaded. All with the same boring reliability you expect from an OEM magazine.

The PMAG 21 GL9 is compatible with all full-size, compact, and sub-compact double-stack Glock 9mm variants with some protrusion below the grip.

Made in U.S.A.


Compatible with all full-size, compact, and sub-compact 9mm double-stack Glock handguns
Durable, lightweight, and extremely stiff polymer construction
High visibility controlled-tilt follower
Long life stainless steel spring for corrosion resistance
Flared, easily removable floor plate
Dot matrix panel for magazine marking and identification
Magazine indicator windows on both sides of body at 10, 15, and 21 rounds remaining
Drops free loaded or unloaded

Additional information

Weight 3.2099305402425 oz
Dimensions 6 × 1 × 1 in

13 reviews for Magpul PMAG® 21 GL9™ – GLOCK® 9X19MM PARABELLUM

  1. Duke Krieger (verified owner)

    Super solid, great price. Never spend high dollar on mag extensions again, when you can buy this magazine.

  2. Vivid (verified owner)

    Good price, good quality, good capacity, what more do you need?

  3. Ben (verified owner)

    I’m not sure there’s a better value for your money if you want more than a 17 round mag. 21 rounds in a reliable magazine for less than an OEM 17 rounder is a pretty amazing value. The only reason I’d recommend some normal +5 magazines is if you’re serious about competition and need those 2 extra rounds for Carry Optics or Limited, otherwise I’d just buy a bunch of these. The fit is slightly different for your mag pouches, you may need to adjust the tension of your mag carrier between OEM and magpul.

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