So....almost a year ago (2014 SHOT show) Knight showed a rifle that was supposed to be released called the KPX. I believe that there was going to be a fixed muzzleloader one and one that accepted different caliber barrels. It appears that idea is gone since of course it never became available and there is no talk about it. A fast twist .45 (like what was rumored) or a 45-70 converted would of peaked my interest quite a bit.