I bought the first one around me locally back in Sept. It is the .50 ML and it is the best muzzeloader I have ever shot, and I have owned a bunch. The trigger is awesome right out of the box and it is a breeze to clean. The breech plug comes out with finger pressure just like they claim( I had 50 shots on mine before I removed it). It took me a little bit to find the right load but I ended up using 2 triple seven pellets(100 gr) and the T/C yellow shockwaves. It puts them right in an inch or less at 100 yards no problem. Unfortuneatly I didn't have a deer in the crosshairs to try it out on this past season. There is always next year. I topped it with a Bushnell DOA250.
The same gun shop I bought this at has a .243 and a 30-06 barrel in stock, but they are pricey at $325.00 ea. I may pick one up later if I have they extra cash.