I have a safari ks stock and as you know they used a heavy barrel for them. The cf Bart #4 is what I’m eyeing to use in it. I think it’ll be really close! Looks great, congratulations I have been full length bedding the inlets with 4 layers of pvc tape on the barrel…when removed it yields a nice .040 gap…I mainly do this for water egress in snowy nasty freezing weather x)