dude, did you even read his post? he's asking about taking a wooden replica over the border and back.
His item would be considered a replica in the eyes of those who are looking at it at the border. Furthermore, most events he wants to take it to would outright not allow it on entry anyways as a costume piece. Anything resembling a modern gun is not admissible as a costume prop at just about every major convention these days.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.