You can have any blank spun for a AI as well. It’s a M27 or M30 shank depending on the model. Basically any option for the surgeon or impact is an option for the AI. Only issue you may run into is trying to run a straight tube in something like an ATX with a forend bridge.What are people’s thoughts on the actual AI barrels compared to say Bartlein or Krieger you could have with Surgeon or Impact?