The Kahr Arms CM45 is a compact semi-automatic handgun chambered in .45 ACP, built on a polymer frame with a matte stainless slide. At 17 ounces unloaded and 5.67 inches overall, it carries easily under clothing while still offering a full enough grip for most hands. 
 

Key Specifications 

• Model: CM45 
• Caliber: .45 ACP 
• Barrel Length: 3.1 inches 
• Capacity: 5+1 rounds 
• Weight: 17 ounces (1.1 pounds) 
• Finish Color: Black frame with matte stainless slide 
• Frame Material: Polymer 
• Manufacturer: Kahr Arms 
   

Detailed Features 

 
The CM45 runs a double action only trigger, which means no manual safety to disengage and a consistent pull on every shot. The pinned polymer front sight pairs with a rear sight for basic target acquisition. Polymer frame keeps weight down and takes the edge off recoil slightly, though .45 ACP in a 17-ounce pistol is still noticeable. 
 
The DAO trigger pull is longer and heavier than what single-action or striker-fired shooters are used to. That matters for accuracy at distance, less so for close-range defensive use where the CM45 is designed to operate.

The CM45 gets consistent praise for how small it is given the caliber. Carrying .45 ACP in a 17-ounce package that disappears under a shirt is the main draw, and most owners say it does that well. Reliability comes up often too — it runs a variety of ammo without issues in most user reports.

The grip ergonomics are well-regarded. It feels solid in hand despite the compact dimensions, which matters for a defensive pistol you may need to shoot quickly under stress.

The trigger pull draws the most consistent criticism. It is heavier and longer than many shooters expect, and for people coming from striker-fired guns it takes adjustment. Accuracy at range suffers for some users because of it.

Capacity is the other sticking point. Five rounds plus one is tight even by .45 ACP compact standards, and some buyers consider higher-capacity alternatives in smaller calibers before settling on the CM45.

Finish wear gets mentioned occasionally in longer-term reviews. A few owners report the coating showing wear faster than expected with regular carry use. Overall sentiment leans positive among buyers who prioritize concealability and simplicity, with the trade-offs in capacity and trigger pull being understood going in.