The Glock 23 Gen 5 MOS is a compact semi-automatic pistol chambered in .40 S&W with a 4.02" barrel, 13+1 capacity, and a black matte finish. It weighs 34.36 oz loaded with an overall length of 7.28 inches. Three magazines are included. 
 

Key Specifications 

• Brand: Glock 
• Model Name: Gen23 
• Caliber: .40 S&W 
• Action Type: Safe Action (Striker) 
• Capacity: 13+1 rounds 
• Barrel Length: 4.02 inches 
• Overall Length: 7.28 inches 
• Weight: 34.36 oz (2.1 lbs) 
• Finish: Black Matte 
• Magazines Included: 3 
   

Detailed Features 

 
The Safe Action system uses three automatic safeties: trigger safety, firing pin safety, and drop safety. There is no manual safety to disengage before firing. The MOS (Modular Optics System) slide is pre-cut for direct red dot mounting without machining. Interchangeable backstraps allow adjustment for different hand sizes. Fixed white dot sights give adequate target acquisition for defensive use, and the frame is polymer with a loaded weight of 34.36 oz. 
 

Usage Scenarios 

 
The .40 S&W caliber offers stopping power that law enforcement agencies have relied on for decades. The compact dimensions make it viable for concealed carry while the 13+1 capacity provides reasonable round count. The MOS optic cut is a practical advantage for shooters who want to add a red dot without a gunsmith visit. At 34 oz loaded it is manageable for all-day carry for most shooters.

The Glock 23 Gen 5 MOS .40 S&W draws positive feedback overall, with a few recurring debates.

Reliability is the most consistently praised trait. Owners report dependable performance in varied conditions, which is why the G23 remains a popular choice for law enforcement and self-defense. The Gen 5 grip texture and palm swell improvements are noted as meaningful ergonomic upgrades over earlier generations.

The MOS optic cut is a frequently discussed advantage, particularly for shooters who want to run a red dot. The 13-round capacity is seen as a practical balance for a compact carry pistol.

The .40 S&W recoil is more noticeable than 9mm, which generates mixed opinions. Some shooters appreciate the caliber's stopping power; others find the snappier recoil detracts from fast follow-up shots. The aftermarket ecosystem for Glock is extensive, and owners regularly discuss trigger upgrades, holsters, and sights.

Pricing is generally regarded as reasonable for the reliability and features offered, though .40 S&W ammunition costs more than 9mm.