So I'm just interested in slide fire stocks. But I can't find them for the SKS. I thought of an idea. Take a six position adjustable stock. Remove and or pin the lock lever that let's you adjust it so it moves freely. Now add a 1" round 4-5 inch long spring into were it adjusts. Cap it off and it should spring back and forth when fires Don't know if it would work. But for a few bucks at the hardware store it might be worth a try.