I currently have a 308 in an AICS, it has a Kreiger MTU bbl. I am wanting to order a Kreiger bbl in .264, heavy fluted, finish at 24" the same contour as a factory contoured AI bbl. Kreiger does not have a AI bbl contour on record. Does anyone know which #Kreiger bbl is the closest to duplicating a factory AI contour? Thanks in advance krw