Shop By .40 S&W
This round is similar to the 9 MM, being slightly larger with many of the same advantages. It is still small enough for a pistol firing this round to be about the same size as a 9 MM but with more power. Magazine size and weight of the round is another reason these are popular rounds. This is a great round for home defense. It is a good compromise if you are looking for something smaller than a 10 MM.