Here you go, Og. "Embiggened."
This is a tough one. I know that were I you guys, I'd have spent all day yesterday thinking, "Dammit, I *know* what that thing is - I know I do!"
And some of you will have that moment later.
But, it ain't a flute or a piccolo. Nor is it a pipe for an organ. It's a firearm part. Those black dots are a serious clue.
But, the dark metal looks machined - originally, then scarred with use, so I am going with firing pin catcher.
...am not a shooter ... so I have an excuse ... for not knowing what it is, not for not being a shooter
:- )
The size is about right, as is the spacing of the 'dots'.
After all, not everything in the Armory is vintage...
My poor ol' brain is thinking the spots are not scaring and not use wear or use coloring but factory original.
I had thought to ask if they were spots, rather than holes, before posting that silliness about silencer barrel but decided to just wing it instead.
Aluminum heat shield from the fore end of an M16A2?
IF it was such an adjustable stock thingie what the butt end hangs off the end of, then that adjustment divot on the far left doesn't leave a whole lot of "thingie" to grab onto....