Tech Sights on the SKS are great! I did notice that they loosened up after a long afternoon of plinking, and I lost the little allen screw they add on the left side. However, Tech Sights mailed me a second set of all the parts except the sight itself for not very much $... so you can replace some parts directly from them. (At least they did it for me, this was last year.) Keep on having fun with that sks!