The Glock 43X MOS is a compact 9mm semi-automatic pistol with a 3.41-inch barrel and a two-tone FDE/Tan finish. It has polymer grips and ships with a 10+1 capacity magazine. The MOS cut allows direct optics mounting without an adapter plate. 
 

Key Specifications 

• Brand: Glock 
• Model: 43X MOS 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 3.41 in 
• Color/Finish: Two Tone FDE 
   

Detailed Features 

• 3.41-inch barrel in a compact frame 
• MOS (Modular Optic System) optics-ready cut 
• Polymer grip frame in FDE/Tan two-tone finish 
• 10+1 round capacity 
• Slim single-stack width in the 43X platform

Owners of the 43X MOS appreciate the slim profile combined with a full-length grip, which gives the gun a feel that sits between a subcompact and a mid-size. The MOS cut is frequently cited as the main reason to choose this variant over the standard 43X, and most report the optic sits low without the need for a riser.

The 3.41-inch barrel draws mixed reactions. Shooters who carry it as a concealed carry pistol find the length ideal, while those coming from longer-barreled pistols sometimes note that felt recoil is snappier. The FDE two-tone finish is generally liked, though a few owners report that the slide's finish shows holster wear faster than the frame.

Value opinions are split. The 43X MOS commands a premium over the standard model, and some feel that premium is justified by the optic-ready platform alone. Others think the trigger could be better for the price, calling it serviceable but not exceptional.