McM inlets for the 600/660 action, but they only inlet for 700 ADL trigger guards reversed, which I don't care for. Boyds inlets stocks for the 600/660 actions. I have 600/660s that have been rebarreled, restocked, and have CVMW bottom metal installed, but I haven't swapped any triggers.
A 600/660 isn't much different from a Seven action, but enough different that Seven bottom metal isn't a drop in fit.
Awhile back somebody posted a picture of a 600/660 installed in a laminated mannlicher style stock. Whoever did the work on that rifle seemed to know what he was doing.
