Is that a Cabelas Hawken? Also what is the measurment across the flats on the barrel on the 54? I have a 15/16" stainless steel 45 cal Green mountain barrel. I am looking for a new donor rifle that I can put this barrel on. I have put three GM 1" barrels on Renegades but I want something a little different for this 15/16" barrel. I was thinking Cabelas for this one. Ron