Glock 21 Gen 5 MOS .45 ACP Pistol 4.61" Barrel - 13 Rd

Glock 21 Gen 5 MOS .45 ACP Pistol 4.61" Barrel - 13 Rd

The GLOCK 21 Gen5 MOS brings the legendary stopping power of .45 ACP into the refined Gen5 platform—now enhanced with Modular Optic System (MOS) capability. Designed for duty, defense, and precision shooting, this full-size striker-fired pistol delivers improved accuracy, reduced recoil, and unmatched reliability in a sleek, optics-ready package.

Featuring GLOCK’s ultra-durable nDLC finish, a 4.61" barrel, and a high-traction Gen5 frame texture, the G21 Gen5 MOS is built to perform in any environment. The ambidextrous slide stop lever, reversible magazine catch, and Modular Backstrap System (MBS) ensure a customizable fit for any shooter. With three 13-round magazines and an included OEM Adapter Plate 06 for Trijicon RMR optics, this pistol is ready to dominate right out of the box.

Optics-Ready MOS Slide
Modular Optic System cut allows easy mounting of red dot sights; includes OEM Adapter Plate 06 for Trijicon RMR footprint.

nDLC Finish
Gas nitride coating offers extreme hardness and corrosion resistance for long-lasting performance.

Gen5 Frame Enhancements
Includes flared mag-well, front slide serrations, and high-traction grip texture for faster reloads and better control.

Safe Action System
GLOCK’s proven trigger safety system ensures consistent, secure operation with no manual safety required.

Customizable Ergonomics
Modular Backstrap System and reversible magazine catch adapt to any hand size or shooting style.

High-Capacity Loadout
Ships with three 13-round magazines for extended readiness and reduced downtime.

Fixed Glock Sights
Factory-installed sights provide reliable point-of-aim accuracy out of the box.

Specifications

• Caliber: .45 ACP
• Barrel Length: 4.61 in
• Overall Length: 8.03 in
• Frame Material: Polymer
• Finish: nDLC (Gas Nitride)
• Sights: Fixed Glock Sights
• Optics Ready: Yes (MOS Cut with Adapter Plate 06)
• Magazine Capacity: 13 + 1
• Included Magazines: 3 x 13-Round
• Weight (Unloaded): 29.81 oz