The Glock 31 is 8.03 inches long, 5.47 inches high, with a slide width of 1.0 inches and an overall width of 1.26 inches. The two Glocks both have a barrel length of 4.49 inches.

One of these, the .357 Sig, is the caliber of choice for the Glock 31 pistol. The Glock 31 is the company’s offering for those into high velocity or long distance handgun shooting.