The Glock G21 V MOS is a full-size semi-automatic pistol chambered in .45 ACP with a 4.61-inch barrel. It has an nDLC finish, optics-ready MOS cut, fixed sights, and ships with 3 magazines at 13+1 capacity. 
 

Key Specifications 

• Brand: Glock 
• Model: G21 V MOS 
• Caliber: .45 ACP 
• Action: Semi Auto 
• Capacity: 13+1 
• Barrel Length: 4.61 inches 
• Color/Finish: Black, nDLC 
   

Detailed Features 

• MOS optics-ready cut for direct optic mounting 
• nDLC finish on slide and barrel 
• Fixed sights 
• Ships with 3 magazines 
• Full-size frame in .45 ACP

The G21 V MOS draws a loyal following from .45 ACP shooters who want a full-size Glock with a factory optics cut. Owners consistently note that the MOS system accepts a wide range of red dot footprints without additional milling, which is a practical upgrade over earlier G21 generations.

The nDLC finish earns praise for scratch and corrosion resistance. The full-size frame in .45 ACP means the pistol is on the larger and heavier end for daily carry, a trade-off that dedicated range shooters accept readily but carry-focused buyers consider carefully.

The G21 V MOS platform inherits the broad Glock aftermarket, and owners appreciate the availability of holsters, triggers, and magazines. The 13-round capacity in .45 ACP gets positive remarks relative to comparable full-size .45 pistols, and the trigger, while stock Glock in feel, gets qualified approval from shooters who have used the platform across multiple generations.