Glock 21 Gen 5 MOS 45 ACP 4.6in Barrel 13+1(3) FDE Optic Ready

The Glock 21 Gen5 MOS is a full-size, duty-grade .45 ACP pistol that blends proven Glock reliability with modern Gen5 upgrades and the MOS optic-ready platform. With a 4.6" barrel and a 13+1 capacity (this configuration comes with three magazines), the G21 Gen5 MOS delivers stout .45 ballistics in a handgun built for consistent function, straightforward maintenance, and comfortable control. The MOS (Modular Optic System) slide lets you mount popular micro red dots quickly, while Gen5 refinements — including the Marksman barrel, ambidextrous controls, and a no-finger-groove grip — improve accuracy, ergonomics, and versatility for duty, competition, or serious range work.

This FDE (Flat Dark Earth) finish model offers a tactical look and durable surface protection for regular use, and the full-size frame helps manage recoil for faster follow-ups with heavy .45 loads. If you want a serviceable, optics-capable .45 that’s equally at home on the range or in a duty role, the Glock 21 Gen5 MOS is a practical, hard-working choice.

Key Features

• Caliber: .45 ACP

• Barrel Length: 4.6 inches — full sight radius for improved accuracy

• Capacity: 13 + 1

• Optic Ready: MOS slide accepts common micro red dot footprints for fast optic installation

• Finish: Flat Dark Earth (durable, tactical appearance)

Specifications

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