Hello. First off I have a CVA optima pro 50cal and love it...yea my buddies said you should buy a thompson your just wasting your money on that other crap...well I have 3 kids so I have a pretty tight budget...anyway I noticed that CVA is now selling the Optima Elite which has barrell options to shoot shells including 243 270 and 30-06. So of course I was curious to see if I could get barrells for my Optima Pro. I sent an email to CVA and the responded "The center fire barrel for the Optima Elite will not fit the Optima or Optima Pro This is due to federal regulations". He didn't say it will not fit physically...he says it will not fit due to federal regulations. Does anyone know anything about this has anyone tried this? Other than blowing back into my face and losing an eye or more does anyone have any input?