That's a GREAT question. I just purchased a JSAR receiver and barrel the other day (still haven't received it). I'd love to be able to find a Semi parts kit to be able to complete it as well. I know Numrich has "some" parts and from reading some of these post Joseph Scott used to have and may still sell some parts. Watching, it appears that the price of Johnson's are falling so parts may also be getting a bit cheaper over the short term (at least I'm hoping so). Other sources of parts would be the auction sites (e.g. gunbroker, auctionarms, gunsamerica etc.). You could also try posting and keeping tabs on some of the C&R and milsurp boards out there. I'm really hoping to find a kit since I don't want to have to purchase these parts individually. I also noticed a reference on the boards to some issues with early SN Johnsons? What were the issues? What was the point or cutoff of any changes?
