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I've noticed on the 17 Gen. 5, 19X A Box on the bottom of the trigger bow

398 Views 2 Replies 3 Participants Last post by  Cocked & Locked
I've noticed on both my Glocks 17 Gen. 5 and my 19X. on the bottom of the trigger bow it has Rough texture and then there's a smooth square Box. I'm wondering if Glock was going to put a proof marking in their for the army. Anybody else have any ideas what they might have put inside the at square Box otherwise why didn't they just have it rough textured
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