The Glock 43 is a 9mm Pyrabrum caliber pocket pistol, the same length as the Glock 26, but with a smaller grip width due to the single-row magazine. Because the Glock 43 uses a single-row magazine, it cannot be used in the same way as other 9mm caliber Glock pistol magazines like the Glock 26, and its magazine capacity is only 6 rounds.