Its from a top-break 12ga, it has no metal parts on it, it seems to fit wood-to-metal with a place for a fastener of some kind underneath in a cut-out with a curved bottom surface. Does anyone know what gun this fits?
That would have been my guess...................Seems to me to be a forearm for one of the single shot shotgun designs that folds almost completely in half... the recess would be for the trigger guard.
http://www.thefirearmblog.com/blog/2009/10/27/guest-post-the-beretta-folding-shotgun/
biggyfries - "Tom, you are brilliant!"