Looks like the bayonet that came on them as long as the mounting lug hasn't been ground off. They make a pretty darn good monopod and if your in the woods and get stomach cramps just plunk it in the ground and hang your coat on the butt stock.
NRA Endowdment Life Member.....F&AM
Curio and Relics License Holder (FFL 03)
Gun confiscation will not happen in my lifetime.
"Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." C.S. Lewis