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A friend of mine recently bought a Glock, and after the first range session, he had an extended mag release installed. The first trip to the range after the install, it began doing this. He took it back to the person who installed the slide release, and he went through 4 different slide releases before he found one that did not do it. 2 days later, it was doing it again, so he had the factory mag release put back on, and it is still doing it.

I tried it in my XD, and it does not happen.