Haha

Barrels come up second hand from time to time, I amagine cost would be prohibitive to fit from new.
The interchangeable barrel option ( within calibre's groups) is another fabtastic feature your getting for nothing.
I now have an offer on them both ( no money yet), so Im not offering a sales pitch, but John Im confident if you get one your M03 will spend a lot of time in the safe!!!.....get one and have a play with it.
Off to work now

Best
Eric