I own and shoot an SKS with this stock. It is a bit wobbly if you move the stock laterally, but works ok when shooting. Folds up to a compact unit. Angle of stock works very well when using the open sights. This is the lightest of the ATI stocks. The fit is typical and very functional.
would be great if they could adapt a butler creek steel hinge unit but the synthetic material is quite tough.
I have tried some AR stocks that also had a definite wiggle too. However, during recoil, all was well. I don't see this as being a negative in the sks product.
Jerry