G17 & Tech Bul 920403 [Archive] - Glock Talk


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11-07-2010, 15:07
When examining a generation 1 G17, how can I determine if 920403 upgrade has been accomplished?

11-08-2010, 11:03
Compare the striker, trigger bar and firing pin safety in your gun to a pic of the older parts. You can find pics all over the web. You will easily see they are similar (old) or different (new upgrade)