Hi Utah, it's going to be chambered in .223 with a 1 in 9" twist barrel.
Mine will have a quarter rib too but it won't be integral. It will have the double transition front to back with a sight island and go from round on top at the front ring to flat where the sights sit. He's also making the front sight ramp and the barrel swivel stud. All three items will have the same transition were they end. A very nice custom touch!
This whole project is going to be some serious coin. I know most people when they get ready to have their "dream rifle" built go with a big bore. I've seen some beautiful ones. My thinking was why not build that once in a lifetime rifle in something I could use 12 months out of the year and not just a trip to Africa. This is not going to be a safe queen.
