The high performance Glock 31 is characterized by extremely high muzzle velocity and superior accuracy, even at extended shooting distances. This .357 Sig pistol is the optimum solution for those looking for these attributes in a reliable, yet lightweight pistol with large magazine capacity. It is available with a 10- or 15-round magazine. Many law enforcement agencies selected the G31 as their official service pistol. Glock "Safe Action" pistols function without compromise, even under the most extreme conditions.