Probably the name. I'm not as up on uppers as I should be, but remember that there are only 2 plants in the US that make stripped lowers, which they then sell to all the manufacturers. Colt, DPMS, Rock River, Remington, Bushmaster, Del-Ton, Stag....doesn't matter. The blank itself comes from one of two companies. It may be the same with uppers, but I'm not sure.
Edited to add; one posible exception is the monolithic upper of the Colt 6940. I'll have to do some more digging on that specific example.
Last edited by The_Dunedan; 10-09-2009 at 05:22 PM..
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