The Glock 19X MOS is a 9mm semi-automatic pistol with a 4.52-inch barrel and a coyote FDE finish. It ships with two 19-round magazines and one 17-round magazine, and includes Ameriglo co-witness sights. The MOS cut accepts a direct optic mounting without a separate adapter plate. 
 

Key Specifications 

• Brand: Glock 
• Model: 19X MOS 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 19+1 
• Barrel Length: 4.52 in 
• Color/Finish: FDE/Coyote 
   

Detailed Features 

• MOS optic-ready cut on slide 
• Ameriglo co-witness sights 
• Two 19-round magazines and one 17-round magazine included 
• FDE/Coyote polymer frame and finish

Owners of the Glock 19X MOS point to the optic-ready slide and the magazine bundle as the reasons to choose this variant over a standard 19X. The Ameriglo co-witness sights work well with common red dot footprints, and the FDE/Coyote finish has broad appeal for both duty and range use.

The crossover format gets mixed feedback depending on hand size. The full-size Gen 5 grip with the shorter 19-length slide is comfortable for most shooters, though those who prefer a compact grip profile find the full frame unnecessary. Magazine capacity at 19+1 is a genuine advantage over standard 17-round Glock offerings.

The MOS variant carries a price premium over the standard 19X, which is the most common point of friction. Owners who run an optic justify it quickly; those who do not sometimes wish they had bought the non-MOS version instead.