This is a 243 conversion that will be offered soon. It will come with a Rock Creek barrel. These are not cheap barrels. They are 5r cut riffled barrels that are match grade with a 1-8 twist and chambered using a match reamer by X-ring. It will also come with our machined barrel nut as well. We can offer them in a few different contours. This one is a slightly larger version of the stock Predator barrel and will require a small amount of inletting to fit. We can also give you an exact match if you prefer. If anyone is interested in one of these or in a different caliber let us know.