Where to start... The 9's are the most reliable (i.e.: most problems are with the PM and MK .40's, and PM45). If you want a .40, go with the steel-framed K40, or poly-framed P40. The CW line has less machining work done on the slide, uses some MIM parts, and is much less expensive.
MK's have a reputation for cracked frames, especially in .40. PM45's are notorious for dropping magazines, and PM9's used to have a problem with peening, and PM40's are still susceptible to it.
I have a K9, PM9, and P380; and used to have a CW9. The K9 and PM9 have been fine out of the box. The P380 had issues during the break-in period, either not extracting, not fully chambering, or not locking back on the last round. Those problems worked themselves out, but required a replacement slide stop. The CW9 had problems chambering during the first 50 rounds or so, but worked itself out.
All are very accurate, but it takes a little bit to get used to the long (but smooth) double action trigger. I like Kahr.
Bottom line is: If you want to shoot .40, go with a K40. If you're ok with 9mm, go with the K9. If you want lighter weight, the P9 (or CW9). If you want smaller and lighter, the PM9.
MK's have a reputation for cracked frames, especially in .40. PM45's are notorious for dropping magazines, and PM9's used to have a problem with peening, and PM40's are still susceptible to it.
I have a K9, PM9, and P380; and used to have a CW9. The K9 and PM9 have been fine out of the box. The P380 had issues during the break-in period, either not extracting, not fully chambering, or not locking back on the last round. Those problems worked themselves out, but required a replacement slide stop. The CW9 had problems chambering during the first 50 rounds or so, but worked itself out.
All are very accurate, but it takes a little bit to get used to the long (but smooth) double action trigger. I like Kahr.
Bottom line is: If you want to shoot .40, go with a K40. If you're ok with 9mm, go with the K9. If you want lighter weight, the P9 (or CW9). If you want smaller and lighter, the PM9.