The Kahr PM40 is a compact semi-automatic pistol chambered in .40 S&W. It has a polymer frame, stainless steel barrel, double-action trigger, and ships with tritium night sights. Total length is 5.35 inches, weight is 15 oz (1.1 lbs), and capacity is 5 rounds. 
 

Key Specifications 

• Caliber: .40 SW 
• Capacity: 5 rounds 
• Condition: New in Box 
• Finish Per Color: Black 
• Frame Material: Polymer 
• Manufacturer: Kahr Arms 
• Model: PM40 
• Type: Semi Auto Handgun 
• Total Length: 5.35 inches 
• Weight: 15 ounces (1.1 lbs) 
• Action Type: Double 
   

Detailed Features 

At 5.35 inches total length and 15 oz, the PM40 is one of the smaller .40 S&W pistols on the market. The stainless steel barrel holds up well under sustained use. Tritium night sights are standard, which matters for a carry pistol. The double-action-only trigger requires a deliberate pull each shot - there is no external safety lever. The polymer frame handles weather without issue. 
 

Usage Scenarios 

The PM40 is purpose-built for concealed carry. Its size and weight work for inside-the-waistband carry where a larger gun would be impractical. For range use and extended shooting sessions, the .40 S&W recoil from a 15-oz frame is noticeable - it is a carry gun first.

Owners of the Kahr PM40 Guardian generally report the same strengths and the same caveats.

On the positive side: the size works. At 15 oz and 5.35 inches, it conceals easily and doesn't drag on a belt. Reliability with a range of .40 S&W loads is frequently cited as a strong point. The night sights are a practical inclusion that most owners appreciate. Build quality is described as solid - Kahr's machining and fit get consistent positive comments.

On the other side: .40 S&W from a 15-oz polymer frame generates real recoil. Follow-up shots take more effort than with a 9mm of the same size, and new shooters sometimes find the recoil management challenging. The 5-round capacity is low even for a micro-compact - competing 9mm options carry more rounds in the same footprint. The trigger pull is smooth but on the heavier side, and some users report sluggish reset during fast strings. A few owners note the gun needs a break-in period before it runs consistently.

Overall it's a dependable carry option for those who specifically want .40 S&W in a small package, but the caliber-vs-size trade-off is real and worth thinking through before buying.