I had heard this might be a possibility and now it looks like CSMC is actually following through with it. I don't have my Model 21 book handy but didn't Winchester already try this?

http://connecticutshotgun.com/m21ou/M21ouFAQ/m21oufaq.html

I'm not sure what to think of it yet. The more I look at the field grade the more I like it. How many O/U shotgun models can one company make and what is next?