Ok...all he has right now in Gen2 but says he will be doing Gen1 as well next time.
https://www.inleadwetrust.com/collec...el-for-sig-mpx
He jumps in in this thread and talks about it.
http://sigtalk.com/sig-sauer-rifles/...g-barrels.html
You might just want to wait and have him switch it out for you.
If you want peace, prepare for war.