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3/5/2004 7:47:56 AM EDT
The new preban M-4 upper I bought is suppose to be a Bushmaster. The only mark on the upper is what looks like a small keyhole.  The barrel is also marked B M (followed by another letter I can't remember) and than 1/9 Nato.  The flattop is also numbered.  Does this sound like a Bushmaster? Thanks.
3/5/2004 11:04:39 AM EDT
[#1]
The keyhole mark is Cerro Forge. IIRC, BFI uses CF forgings.

The barrel should be marked B MP, [b]B[/b]ushmaster [b]M[/b]agnetic Particle [b]P[/b]roof Load. Dunno if BFI numbers their uppers.

There's a thread in the FAQ that covers all this.
3/5/2004 7:51:12 PM EDT
[#2]
Thanks for the info.
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