The Glock 19 Gen5 MOS is a mid-size 9mm semi-automatic pistol with a 4.02-inch barrel and a 15-round capacity. The MOS (Modular Optic System) slide is factory-cut for direct-mount red-dot sights. This USA package includes an Aimpoint ACRO P-2 optic. 
 

Key Specifications 

• Brand: Glock 
• Model: 19 Gen5 MOS 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4.02 inches 
• Capacity: 15+1 
   

Detailed Features 

• MOS optic system slide cut compatible with direct-mount red-dot adapters 
• Bundled with Aimpoint ACRO P-2 optic 
• Gen 5 frame with no finger grooves and flared mag well 
• 15-round magazine capacity 
• 4.02-inch barrel

Owners of the Glock 19 Gen5 MOS tend to treat it as their baseline carry or home-defense pistol. The Gen 5 frame changes, especially the removal of finger grooves and the improved trigger reset, get consistent approval from those who ran earlier generations.

The MOS cut is a significant draw. Owners report the Aimpoint ACRO P-2 bundled version as a practical starting point, though some swap the optic based on personal preference. Mounting stability and zero retention after manipulation are generally described as solid.

The Glock 19 platform is divisive in one specific area: the stock trigger. Most Gen5 owners find it acceptable, but those coming from striker-fired competitors sometimes install aftermarket options before logging many rounds. The 15-round capacity is rarely a complaint at this frame size.