[Researcher]

From its introduction the Sterlingworth was a "made for stock" gun, made to standard specifications. Here is the 1913 vintage Sterlingworth folder --

1913 Sterlingworth Folder front.jpg

1913 Sterlingworth Folder inside.jpg

and here are the Sterlingworth pages from the 1914 A.H. Fox Gun Co. catalog --

1914 Sterlingworth picture.jpg

1914 Sterlingworth Text.jpg

Note that the text under STOCK always says "Full capped pistol grip only."