[ARCHIVED THREAD] - Help IDing uppers???

Posted: 3/23/2009 1:06:43 PM EDT

Ok, I was recently given some uppers and I have no idea how to ID them.

The first one is a flat-top stripped upper, looks new, no markings on it other than what looks like a key-hole shape above the forward assist. Also has no "T" markings.

The second appears to be a barely used flat-top 20" upper with no handguards. The barrel is marked "B MP 5.56 NATO 1/9 H BAR". No markings on the reciever section itself other than "T" markings on the rail with no coloring of the numbers.

I'm guessing that the 20" is a bushmaster based on where it came from, but I have no idea otherwise.

This makes me wish uppers had a brand name on them just like lowers.

Posted: 3/23/2009 1:14:27 PM EDT

[#1]

Key hole = Cerro Forge casting, several manufactures use them.

Posted: 3/23/2009 2:16:04 PM EDT

[#2]

Quoted:
Key hole = Cerro Forge casting forging, several manufactures use them.

Posted: 3/23/2009 5:22:11 PM EDT

[#3]

Cool piece of info. Thanks!
Any idea on the 20" barrel or are those just genaric markings on a 20" 5.56 1x9 Heavy Barrel? What's "B MP"?

Posted: 3/23/2009 5:23:20 PM EDT

[#4]

That's a Bushmaster barrel that has been MP tested

Posted: 3/23/2009 5:40:30 PM EDT

[#5]

MP tested?

Thanks for all the info, I really appreciate it.

[ARCHIVED THREAD] - Help IDing uppers???

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[ARCHIVED THREAD] - Help IDing uppers???

[ARCHIVED THREAD] - Help IDing uppers???