This is the best I can get you guys for now. I will have the drawing from my machinist soon. I hope from the photos the modification doesnít look that difficult. I watched my machinist do it; it took about 10 min. from start to finish.
I donít know if anyone makes a 40S&W upper. We are having our own uppers in 9mm, 40S&W, and 357SIG being built now. I do not have an ETA on them.