02-28-2020, 11:07 AM
The "keyhole forge code" is simply the manufacturer's mark/imprint of who originally forged the upper prior to final machining. It is shown in his picture about an inch below the rail directly above the word "safe".
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Gas Tube Blues
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Gas Tube Blues - by Lastrites - 02-28-2020, 11:07 AM
Gas Tube Blues - by montana - 02-19-2020, 06:16 PM
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