The slim profile, single stack, double action only line of Kahr semi-autos has become popular among everyone looking for a compact yet powerful concealed carry handgun. Kahr Arms expanded its polymer line with the introduction of the CW4043. Based on the 9mm DAO CW9, the CW4043 is chambered for the .40 S&W. It has a barrel length of 3.6 inches, a capacity of six plus one and an overall length of 6.1 inches.