Jon, I would be careful of zealous prosecution under "constructive possession" laws. People sure do get convicted and imprisoned for unassembled parts under certain conditions. The presence of a legal use within the jurisdiction which you have the parts, is usually an affirmative defense (my example of three round extensions that can fit on seven or eight round magazines, with the seven round use being legal and therefore the parts probably legal).
Also, saying you plan to assemble the parts in another state is generally not a defense.
There is nothing illegal about what he is doing. Too much BGOS around here
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