two questions...is the threads on the 15-22 barrel mil-spec?, and....if any of you guys that have replaced the factory supp would you be interested in parting (cash) with it? i have the the mil-spec adapter on my barrel and would like the factory suppressor. or is this avail from the S&W website, i looked but couldn't locate it. PM me or respond to this thread if this is possible. thanks to all.