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Unread 08-07-2017, 08:18 AM   #27
alvin
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On all types of guns that I have seen, modification of number on non-regulated parts (such as barrel, on some small parts, on accessories, etc) happen from time to time. But modification of number on regulated parts, such as long gun receiver & pistol frame is extremely rare.

But those are legal guns. On illegal guns, God knows.
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