The Kahr Arms P40 is a compact semi-automatic handgun chambered in .40 S&W. It has a polymer frame, a 3.5-inch barrel, and a double-action-only trigger. At 18.7 oz (2.3 lbs) and 6 inches overall, it's sized for concealed carry without much compromise on caliber. 
 

Key Specifications 

• Caliber: .40 S&W 
• Capacity: 6 rounds 
• Condition: New in Box 
• Finish Color: Black 
• Frame Material: Polymer 
• Manufacturer: Kahr Arms 
• Model Number: KP4044A (P40) 
• Type: Semi-Auto Handgun 
• Weight: 2.3 lbs (18.7 oz) 
• Barrel Length: 3.5 inches 
• Total Length: 6 inches 
   

Detailed Features 

The double-action trigger gives a consistent pull on every shot without a separate manual safety to disengage under stress. Fixed sights keep the sight picture simple and durable. The polymer frame keeps weight down, which matters over a full day of carry. A manual safety is included for those who prefer it. 
 

Target Audience 

This is a carry-focused pistol for people who want .40 S&W power in a package small enough to conceal reliably. It works for home defense as well, though the 6-round capacity is worth noting. Newer shooters can run it, but the .40 S&W recoil in a compact frame is something to train around. 
 

Usage Scenarios 

• Everyday concealed carry where a smaller package outweighs the capacity trade-off. 
• Home defense where maneuverability in tight spaces matters. 
• Range practice and familiarity drills for carry-caliber shooting.

Kahr P40 owners generally like the size-to-power ratio. The compact footprint and light weight make it easy to carry all day, and the smooth double-action trigger gets regular praise for accuracy during follow-up shots.

The recurring criticism is reliability during the break-in period. Some users report failures to feed or eject in the first few hundred rounds, which creates real hesitation about trusting it for defensive use straight out of the box. Most note that reliability improves after the break-in, but it's a legitimate concern. Grip ergonomics are also a split issue — some find it comfortable, others wish for a bit more purchase.

Recoil is the other consistent topic. The .40 S&W generates more snap than 9mm, and in a compact frame with a short grip, some shooters find it harder to manage than expected. It's not a dealbreaker for most, but it does affect how much people enjoy shooting it at the range versus just carrying it.