The GLOCK G48 MOS is a compact semi-automatic pistol chambered in 9mm with a 4-inch barrel. It has the Modular Optic System cut on the slide and ships with 15-round magazines. The pistol has a rail under the dust cover for accessory mounting. 
 

Key Specifications 

• Brand: GLOCK 
• Model: G48 MOS 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 15+1 
• Barrel Length: 4 inches 
• Color/Finish: Black 
   

Detailed Features 

• Modular Optic System (MOS) slide cut for direct optic mounting 
• 15-round magazine capacity 
• Rail on the frame for light or laser attachment 
• Compact single-stack-width slide profile

Owners of the G48 MOS frequently cite the slim profile as the primary draw. The single-stack-width slide in a pistol that carries 15 rounds is a combination that shooters coming from smaller single-stack guns find immediately appealing. Most describe the transition as natural if they have prior GLOCK experience.

The MOS cut is well-received for optics versatility. Owners who run micro red dots report the system holds zero reliably under regular range use. A common complaint is that the MOS adapter plates add height to the optic, which some find disrupts their co-witness sight picture. The included iron sights are functional but not a standout.

The rail is a practical addition, though the G48's slim frame limits which lights fit cleanly. Overall build quality gets consistent positive marks. The trigger is the standard GLOCK unit, which experienced GLOCK shooters accept and newer owners sometimes find underwhelming compared to aftermarket alternatives.