They are going to the closed bolt like the other outfit brought in the 100 models back over 5 years ago. I should know I had one,No open bolt like they sold Canada. and of course with stock in forward position. or they get into the SBR thing.
I have done this stuff for 45 plus years, so watch it all very carefully. so wishing them luck since they brought them in before under a different outfit. had #461