This is the factory Glock 9mm barrel that comes stock in the Glock model 26. Using it to convert the 27 or 33 to shoot 9mm is not recommended and unsafe as it is not a 100% fit.
Height: 1.26 inches
Length: 3.46 inches
Rifling: right hand, hexagonal
Length of Twist: 9.84 inches
Travels at: ~ 1115 feet per second
Using reloaded or lead ammunition in Glock barrels is NOT recommended!