fastbolt
Member
I have seen Glocks rendered inoperable from too much lubrication and poor cleaning technique; the firing pin channel was so clogged with gunk the weapon would have light primer strikes and not fire consistently or at all.
Sometimes a cleaning practice may create a problem, too.
In one of my Glock recerts there was an armorer from another agency who gave an example of how the head of a cotton swab, used to clean out the FP channel, had come off inside the channel and not been noticed. Naturally, the FP couldn't reach the primer of a chambered round when the slide was reassembled.
The morals of the story were to use better quality cotton swabs (you can order some made to use on guns, FWIW) ... and make sure you pay attention when cleaning the gun, and inspect it after cleaning and reassembly.
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