This is the factory Glock .357 barrel that comes stock in the Glock model 31C. It can also be used to convert the 22C to shoot .357 sig. It cannot be used as a compensated barrel in the 31 or 22 due to the lack of ports in the side. Using it to convert the 17C to shoot .357 sig is not safe as it will not fit into the slide properly. Calibers can only be converted down, not up. This barrel will not work extended in the 23C or 32C due to the difference in the locking blocks
Caliber: .357 sig
Height: 1.26 inches
Length: 4.49 inches
Rifling: right hand, hexagonal
Length of Twist: 5.98 inches
Travels at: ~ 1430 feet per second
Using reloaded or lead ammunition in Glock barrels is NOT recommended!