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Posted: 9/25/2004 1:37:05 PM EDT
| the upper i have is an a3 with a keyhole type symbol on it |
Could be Colt, could be Bushmaster, could be RRA, could be an aftermarket part....................they all use the keyhole forged upper. Cerro Forge is the company with the keyhole forging mark and they supply raw forgings to nearly all the manufacturers and the manufacturers finish the receivers, without adding any other marks to the receivers. Your guess is as good as mine.
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