Just out of curiosity, is there a .357 cartridge that is NOT a magnum? In other words, is there a similar parallel in 357 like there is with .38 caliber and .38 Special?
If there isn't a non-magnum .357 caliber cartridge, then Glock does have a .357 model.
Glock 31
There is a 357sig which is what glock uses. It is not a 357 magnum. The rounds are not interchangeable.
I suppose the non magnum version of a .357 magnum is the .38 special which fires out of the same revolver.