I have a question about .40 open guns. I assume you guys are taking a standard dia. 6" barrel and cutting it down to 5.5", or what is required, threading it and adding a cone comp then reaming the comp to .40 right? I looked at building one years ago and remember seeing a .40 barrel and comp kit but now that I have started looking again there is nothing. Much like everyone else I have lots of stuff for .40 and a limited STI in .40 and don't want to invest in dies, brass, mags and all the usual stuff.