The Magpul PMAG 21 GL9 is a 21-round polymer magazine designed for Glock-platform 9mm double-stack pistols. It uses a stainless steel spring and a high-visibility controlled-tilt follower to promote reliable feeding through thousands of rounds. The magazine meets the overall length requirements for a 140mm competition magazine, offering additional capacity without the need for extensions. Constructed in the United States, the PMAG 21 GL9 is built for routine range use and competition settings where consistent performance matters.
Key Specifications
- The magazine holds 21 rounds.
- Caliber is 9mm Luger.
- Construction uses polymer for lightweight stiffness and durability.
- Finish is black.
- Spring material is stainless steel for corrosion resistance.
- Feature: removable flared floorplate for easy cleaning.
- Feature: capacity indicator windows at 10, 15 and 21 rounds.
- Follower type: high-visibility controlled-tilt follower.
- Drops free loaded or unloaded for fast reloads.
- Origin: Made in the USA.
Whether you’re building a competition-ready rig or stocking reliable spare magazines for the range, the PMAG 21 GL9 offers additional capacity in a proven, lightweight polymer package. Its service-oriented features—stainless spring, removable floorplate, clear capacity windows, and positive drop-free performance—make it a practical choice for shooters who prioritize dependable function and straightforward maintenance.
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