Interesting specs on both guns. I know the new 34 was designed to fit into the shooter's box for overall length, etc. But on the G17L, the overall is 8.85 inches, with a 6.02 inch barrel. The Glock 34 is 8.82 inches with a 5.31 inch barrel. If the choices were between the two, the sight radius is basically the same. SO, you get more barrel length with the 17L. Does it make more sense to get the old 17L than the new one for greater fps? Wanna kill these ads? We can help!