While trying to sell a good revolver with no 'takers' . . .

I was able to trade it for a NIB Tactical Solutions ~ Takedown ~ X-Ring VR .22 LR
Rifle with Magpul 'Backpacker' Stock. I've never had anything like 'this before' - But I am excited.

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Any opinions or comments about these rifles?

I also don't know what those two black holes on each end of the rear stock are for?
Sling maybe?