GLOCK 21 GEN 5 MOS 45ACP 13RD PISTOL

Glock 21 Gen 5 MOS – Big-Bore Power Meets Modern Optic-Ready Design

The Glock 21 Gen 5 MOS delivers hard-hitting .45 ACP performance in a full-size frame, now with optics-ready capability. Glock's Modular Optic System (MOS) lets you mount your favorite red dot fast—making this pistol faster, more accurate, and ready for anything.

This Gen 5 upgrade gives you Glock’s most refined features yet: better ergonomics, improved accuracy, and a cleaner shooting experience.

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Big-Bore .45 ACP, Modern Features

The Glock 21 has always been known for power. Now in its Gen 5 MOS form, it keeps the 13-round capacity and .45 ACP stopping force, while adding a flared magwell, Glock Marksman Barrel (GMB), and no finger grooves for a more comfortable grip.

With less muzzle rise and better shot control, this pistol stays on target—even with full-power .45 loads.

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Built for Red Dots and Duty Use

The MOS system allows easy installation of most red dots using Glock’s adapter plates. That means faster target acquisition, better precision, and a tactical edge in any scenario.

The front slide serrations provide easier press checks and slide manipulation. The updated internals also give you a smoother trigger pull and better reset.

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Key Features

• Caliber: .45 ACP

• Capacity: 13-round magazine

• Barrel Length: 4.61 inches (Glock Marksman Barrel)

• Optics-Ready: MOS (Modular Optic System)

• Frame: Full-size, no finger grooves

• Magwell: Flared for faster reloads

• Slide Serrations: Front and rear

• Finish: nDLC black

• Sights: Fixed Glock sights (optic not included)

• Trigger: Gen 5 improved trigger system

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Durable, Dependable, and Duty-Ready

This pistol is built for serious use. Whether you’re on duty, defending your home, or at the range, the Glock 21 Gen 5 MOS offers unmatched simplicity and durability.

It’s easy to clean, easy to shoot, and tough enough to run thousands of rounds without fail. Add your favorite red dot and you're ready for fast-action defense or precision shooting.

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Why Choose the Glock 21 Gen 5 MOS?

You get full-size .45 ACP firepower with modern upgrades that matter. The optic-ready MOS platform, enhanced barrel, and improved ergonomics take the classic Glock 21 to the next level.

If you’re ready to step up to a .45 that shoots like a dream and fits your optic, the Glock 21 Gen 5 MOS is the one to own.