The Glock 19X V MOS is a 9mm full-size pistol with a 4.52-inch threaded barrel and an optic mounting system cut into the slide. It ships with a 17+1 and 19+1 capacity configuration and is US Made. 
 

Key Specifications 

• Brand: Glock 
• Model: 19X V MOS 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4.52 in (threaded) 
• Capacity: 17+1 / 19+1 
• Color/Finish: DE 
   

Detailed Features 

• MOS (Modular Optic System) slide cut for direct optic mounting 
• 4.52-inch threaded barrel 
• Compatible with both 17-round and 19-round magazines 
• US manufactured

Owners of the Glock 19X V MOS often cite the MOS cut as the main draw, making it straightforward to mount a red dot without an adapter plate. The threaded barrel gets use with compensators or suppressors (with the appropriate federal transfer paperwork for the latter), and the 9mm chambering keeps the shooting cost relatively low.

The DE finish is a polarizing detail. Some owners appreciate the two-tone look of the 19X platform; others would prefer an all-black option. The feel of the frame, which blends the larger grip with the shorter slide, divides opinions depending on hand size.

The 19X V MOS is generally seen as a reliable range and home-defense pistol. A common mild complaint is that the factory trigger, while functional, is considered a first upgrade target by many owners who want a crisper break.