From the website they are making a shotgun sets, combination rifle/shotgun sets and an "express" sets of barrels.

I gather the "express" is a double rifle set of barrels?

So the new 612 is just a new designed action/rifle/shotgun designed to replace the 512 and I gather no longer any interchangability?

If so lucky I bought up what I needed for my Tikka 512SD ... shotgun barrels, combination 12g/.223, 12g/7x65R, .30-06 DR set and 9.3x74R DR set. Was just discussing the Tikka/Valmet/Finnclassic with a member last week. And why I bought up simply because they were available and while they are, act else they will be gone tomorrow. How true that way.

PS Moving the post above to a new thread.