I'm amazed at the number of Rem 66 lovers. While they were
dependable and low maintenance, I never found them to be
extremely accurate. The "action housing" is a sheet metal cover
containing the grooves for scope mounting. The action uses the
Nylon stock as a built in rail for bolt. I have never broken one
but have seen several with cracked stocks in action area. This
can't really be held against them because any rifle that had the
force necessary to do this would be seriously damaged also. I
don't own one at present, I use to keep one around for the kids
because of light weight. I will say it's tube feed was a lot better
than other similar priced 22s of the period. I put them in the
class of a dependable plinker.