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AR15.COM
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10/10/2002 4:58:36 PM EDT
I have a Pre-ban upper with a 20" Heavy barrel and bird-cage diverter.  I am curious as to who made it.  Any ideas on what to look for that might lead me to find out who manufactured it?  Thanks!!
10/11/2002 7:29:58 AM EDT
[#1]
Do you want to know who made the upper receiver or the maker of the barrel?  They may be the same, they may be differant.

For the upper receiver, look for letter codes on the right side near the rear sight.


For the barrel, look for markings under the handgard, stamped on the barrell.


Then look here:  www.biggerhammer.net/ar15/
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