The barrels come in 15/16th and 1 inch on the flats depending on what you buy. The Renegades are 1 inch on the flats. The T/C Hawkins .50 is 15/16th and their .54 is 1 inch on the flats.
They come in blued and stainless. And the front site is dovetailed. Also the rear sight comes off and leaves two screws for a base platform.
The max load is 110 according to them. That is more then enough power for anything you want to hunt. They are excellent sabot shooters and mine shoots a 460 grain Bull Shop in .503 real well also. I use 80 grains is all.