If it is both colt upper and lower then get the colt, There are a bunch of original Colt kits out there right now that do not include lower or barrel, they are being built with no name lowers and labeled as colt original.
If that is the case then get the bushmaster.
Reminds me of the Noveske rifles for sale in the classifieds. Noveske blem lower and del-ton rifle kit.
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