All pistols can and do occasionally fail when excessive pressure destroys the ability to stay in one piece. Glocks are in wide use and therefore have a large percentage of these failures. The failures are not of design or content failure, but of ammunition that is not in spec. Ocassionally a very lead fouled barrel will also cause a failure. I would not worry about any caliber glock that is cleaned and maintained well , and that uses quality ammunition that is new factory or reloaded by people with the skills to do so.
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