The Glock V-Series Model 21 MOS, 45 ACP, 4.61-Inch, Ported (brand part no. UV2150203MOS MODPTBLK) is a custom-finished full-size 45 ACP pistol with a ported slide and barrel for reduced muzzle rise, wrapped in a black Cerakote finish. Glock builds the G21 on a durable polymer frame with a black gas nitride barrel finish, and this MOS-equipped slide carries Glock’s Modular Optics System so shooters can mount a red dot directly. Three 13-round magazines ship with the pistol, matching the G21’s standard full-size 45 ACP capacity. Among semi-auto handguns, this V-series 21 MOS favors 45 ACP shooters who want reduced recoil from the porting and the flexibility to run a red dot.

Key Specifications

• The chambering is .45 ACP.
• The barrel length is 4.61 inches.
• The magazine capacity is 13 rounds, with three magazines included.
• The slide and barrel are ported to help control muzzle rise.
• The slide is MOS optic-ready, accepting Glock’s Modular Optics System plates.
• The finish is black Cerakote over a black gas nitride barrel.
• The frame material is polymer.

Frequently Asked Questions

How many rounds does the magazine hold? 13 rounds, the G21’s standard full-size 45 ACP capacity, with three magazines included.

What does the porting do? The ported slide and barrel vent gas upward to help reduce muzzle rise and speed up follow-up shots.

Is this pistol optic-ready? Yes, the MOS-cut slide accepts Glock’s Modular Optics System plates for mounting a red dot.

Buy the Glock V-Series Model 21 MOS Ported

Reduced-recoil porting and red-dot readiness on a full-size 45 ACP platform are exactly what this V-series 21 MOS delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.