The Glock G45 MOS is a Gen5 semi-automatic pistol chambered in 9mm with a 4.02-inch nDLC barrel. It has an MOS8 optic cut and ships with an Aimpoint COA optic installed. The Gen5 configuration includes an ambi slide stop, flared magwell, and no-groove frame texture, with a 10-round magazine. 
 

Key Specifications 

• Brand: Glock 
• Model: G45 MOS Gen5 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 4.02 in 
• Color/Finish: Black / nDLC 
   

Detailed Features 

• MOS8 optic cut with Aimpoint COA optic included 
• Ambi slide stop for left- and right-hand use 
• Flared magwell for faster reloads 
• nDLC slide and barrel finish 
• No-groove Gen5 frame texture

Owners of the G45 MOS appreciate the full-size grip paired with the compact slide format. The Aimpoint COA inclusion is seen as a practical package that gets the pistol optics-ready without an additional purchase. Most users find the MOS8 cut well-suited to the COA footprint and compatible with several other optic options.

The Gen5 trigger draws a split reaction. Some find it a clear step up from earlier Glock generations, while others swap it for aftermarket options immediately. The no-groove frame texture is a consistent discussion point; users who preferred the old finger grooves tend to add grip tape or panels, while others appreciate the cleaner surface.

The 10-round configuration satisfies buyers in restrictive jurisdictions but draws frustration from those expecting standard capacity. Build quality and reliability carry little debate, and the G45 is generally viewed as a dependable platform with a strong aftermarket.