I have a Ruger 10/22 with synthetic stock also and have been wondering the same thing. The material is rather thin at the spot where you’d normally mount a sling swivel on the stock. I’d suggest adding one of the stock/pouches (good place to keep survival supplies) that includes a swivel to attach a sling on the side, along with an aluminum band for the front of the stock that has a swivel on the side as well. After the 1911A1 the 10/22 has more after market accessories than any other gun I know of.

Cheers,
W-W
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