i got a sks UTG quad rail from hical a few wks ago.. and love it!, looks great on the rifle for sure. it does add a lot of weight though, but balanced out nicely once i removed the bayonet..
i wouldnt trust a red dot or other sight to stay zeroed however, and you have to completely remove the rail everytime you do a cleaning.. but for mounting lights and accessories its a great addition to the rifle. plus you dont have to modify the rifle in any way for attaching it.