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Posted: 4/10/2009 12:01:38 PM EDT
| Does anyone know who made A1 uppers w/ forward assist and PK forge codes and when? |
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I don't know why we can't seem to get the forging codes tacked a the top, but IIRC PK = Elisico/Kaiser Aluminum forgings produced for the Phillipines production contract.
All the PK uppers I have ever seen are black anodizing instead of gray, and don't have proof stamps in front of the ejection port. Best guess is late 1970's/early 1980's production(?) |
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