The ETS Group GLK21 13-round magazine for .45 ACP is a modern alternative to factory Glock 21, 30, and 41 magazines that brings durability and visibility to your carry or range kit. Built from advanced polymer rather than traditional steel, this magazine cuts weight while delivering the toughness you need in the field. The clear body lets you verify your ammo count and ammunition type at a glance—no guessing whether you're running hollow points or full metal jacket, and no fumbling to peek inside. That transparency also makes troubleshooting feed issues quicker when it matters.

ETS engineered this mag to handle real-world punishment: the polymer resists impact that would dent or bend a steel mag, shrugs off harsh solvents and cleaners, and won't become brittle in extreme cold or degrade under UV exposure. The feed lips and body are creep-resistant, so the magazine stays reliable even after weeks fully loaded in your magazine pouch. The ergonomic floor plate is designed to make reloads smoother, giving you a solid grip when pulling the mag from a pouch during rapid fire or transitions at the range.

The 13-round capacity fits the standard Glock .45 lineup, and the base is engineered to work with aftermarket Glock magazine extensions if you want to add extra rounds later. Field stripping is straightforward thanks to ETS's purpose-built base plate. For shooters tired of heavy steel mags or worried about rust and corrosion, this polymer option delivers practical advantages without compromise.

Key Features

• 13-round capacity for Glock 21, 30, and 41 (.45 ACP)
• Clear polymer body shows ammo count and ammunition type
• Advanced polymer resists impact, chemicals, and extreme temperatures
• Creep-resistant design maintains reliability under long-term full-load storage
• Ergonomic floor plate for confident mag changes and pouch handling
• Compatible with Glock-pattern magazine extensions
• Easy disassembly base plate for cleaning and maintenance

Specifications

Brand	ETS Group
Caliber	.45 ACP
Capacity	13 Rounds
Fits	Glock 21, 30, 41
Material	Advanced Polymer
Body Style	Translucent Clear

Frequently Asked Questions

What Glock models does this magazine fit?

This ETS magazine is designed for the Glock 21, Glock 30, and Glock 41—all .45 ACP pistols. Double-check your model before ordering.

Can I use Glock magazine extensions with this mag?

Yes. The ETS base is designed to be compatible with Glock-pattern extensions, so you can add capacity if needed.

Will the polymer body crack or break if I drop it?

The advanced polymer is engineered for extreme impact resistance and won't crack or break from drops. It's built to handle the rigors of training, range work, and carry.

How do I know when I'm low on ammo?

The translucent clear body lets you see your ammo count and ammunition type at a glance. No need to unload or guess.