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Glock proof marks

877 Views 2 Replies 3 Participants Last post by  voyager4520
I have read some posts concerning Glock proof marks. Can someone explain this to me and what to look for?
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The three-letter marking on the barrel that does not match the serial number is a date code that indicates the month and year of the proof testing in Austria.

Above the front of the trigger guard:
On the slide and barrel:
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