Check the regulations in your State before buying one. Where I live you can't use a muzzle loader like that. Full bore bullets or round ball only no Sabot's, bullet can't be more than twice the length of the diameter. No smokeless poweder of pellets, and no optics unless you are handicapped with vision that can't be corrected to 20/30.
Cool ML for sure and they aren't the only ones that build LR ML's. There are several companies out there that build them. Some guys have been successful out past 500 yards with them.