[Maestro]

Originally Posted by luger.parabellum

I,ve got one, it's probably the best rig I've got.
I would redirect you to a previous post: "1900 AMERICAN EAGLE WITH ORIGINAL IDEAL STOCK" where you can see some of my photos but more important an excellent explanation given by Itacaartist.

... yes, here it is:

Originally Posted by ithacaartist

Glenn,

I'll give you a little more detail... There are a pair of tangs extending forward from the front each side of the Ideal stock. When they are slipped through the slots Sergio mentions, they are then spread apart by moving a separator in the tubular frame, which also shifts the frame into shape for use. Hooks on the leading ends of the tangs are engaged with lugs on the back/frame sides of the grips. You can see the hooked portions in one of the pics above. Thus locked to the grips, which are, in turn, fastened to the frame by three screws; One is the usual grip screw, two more are the source of the question about them above; two tappings must be created on each side of the frame to accommodate them.

The stock lug on the Parabellum pistol became standard military spec in 1914, I believe. Many commercials and contract guns don't have them, and usually a 1900 or '06 does not. The lug wasn't meant to be used, though I'd bet it surely was, on 4" pistols, but was part of the configuration you'd expect on Navy or Artillery model pistols, both of which were issued with wooden board stocks. Commercial Navies, Arties, and Carbines obviously had them...