Another whatizzit question

[Coonan357]

My father-in-law passed away recently. I found this tucked in amongst his stuff.
I'm curious about the aluminum plate between the boxes. There is no mention of it in the instructions.
It could be that it was just put in the box and may not be firearm related at all.
Can anyone identify it?

 

[skfullgun]

That is a “door” that fits in a specially designed butt-plate to access a storage compartment in the stock - storage for a choke or extra shells.

 

[skfullgun]

Most likely fits a Savage 24. It goes between the plastic buttplate in the far right of your photo and the stock.

 

[Coonan357]

How cool is that!
Thank you for the quick answers!