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1/6/2007 3:53:58 PM EDT
I have a friend who has asked me to sell his AR, he knows nothing about it except that he's hardly ever shot it.  I am not well versed on upper markings so I pose the question here.

The upper is a 20" HBAR A2, the only markings are a C on the bolt carrier, and CM in front of the rear sight assy on the carry handle. It is a dark black finish, not like parkerized, with a smooth texture, it has a compensator with 4 rows of 3 holes extending lengthwise.  The lower is a Pre-ban DPMS, and he has had the rifle for at least 10 years.

Is it safe to assume this is a Colt upper??  

Any help would be greatly appreciated
1/6/2007 4:10:01 PM EDT
[#1]
The CM indicates that the upper receiver is Colt.
What are the markings on the barrel ?

Mike
1/6/2007 4:33:31 PM EDT
[#2]
There are no markings on the barrel or on the FSB.

Thanks for the help thus far
1/6/2007 5:45:06 PM EDT
[#3]
Colt barrels will be marked   C  MP  5.56 1/7 or 1/9 ect
The C on the bolt carrier is Colt

The barrel is a ????
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