Can Anyone help me identify this part?

[pertnear]

I bought a box of "gun stuff" at an estate sale. In with a Ruger 10-22 stock was a plastic insert that looks like a bedding block of some kind. It is labeled RT-10. Anyone have any idea from the attached pictures what it fits & what it's for? :confused:

As always, your comments & help are most appreciated.

316672

316673

[2152hq]

My guess is a part from the Butler Creek accessory stock(s) that were sold for the Ruger 10-22.
The folding stock/fiberglas type. One was their RT10 model. I think they sold another as well(?) maybe a conventional style stock.

That's about all I know about them.

[Texas by God]

Maybe a Ramline forend insert for weight addition(birdshot)???
I got no idea.


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