This is the factory Glock .40 barrel that comes stock in the Glock model 35. It can also be used as an extended barrel to convert the 22C to shoot as a non-compensated. Converting the 31 or 31C to shoot .40 s&w is also possible. Using it to convert the 17 to shoot .40 s&w 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 23 or 32 due to the difference in the locking blocks.
Caliber: .40 s&w
Height: 1.26 inches
Length: 5.32 inches
Rifling: right hand, hexagonal
Length of Twist: 9.84 inches
Travels at: ~ 1015 feet per second
Using reloaded or lead ammunition in Glock barrels is NOT recommended!