Among Glocks, the .40s seem to be less reliable than the 9s. That said, I've had FTF in my Glock 17 when it was new. And I've had light strikes in my Glock 34 and watched novice shooters limp wrist it. My Glock 23 has been more reliable. YMMV.
Stovepipes seem to be more likely a magazine problem, which might be why the Milwaukee PD is replacing their magazines.
Glocks are fine guns, but they are not perfect -- nothing made by man is.
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