Ray Brazille is the onle who has the file of American Rifleman journals.
He found the piece that Ed McGivern was referring to, in the letter to
Walter Groff. It's a very short advertisement placed by Kearsarge, and
it talks about the McGivern modification to his stocks, for people with
small hands. It referenced the Number 3 stock design.

Thanks to 29-1, here is that advertisement :



I then remembered that I have a copy of the Kearsarge product list,
and sure enough, there is the Model 3 design. Right next to it is The
McGivern stock, and it looks exactly like the stocks that are on this K-22!
Here is the 4-page Kearsarge brochure :









Chuck:

Thanks for the comment. All those McGivern guns are good collectible
guns. I really only wanted this one, both because it lettered to McGivern,
and because of the Kearsarge stocks. The regmag is a great gun, but
it was a lot more money !

Steve:

Yes - there were a good number of holsters, including some Myres, as
I recall. Jim Olsen, Walter Groffs nephew once or twice removed, had/
has a lot of McGivern material .

Regards, Mike