we were at the range the other day and my friend was shooting his sks. it has a decent rifle scope on and the gun would shoot all over at 100 yards. these were controlled and well placed shots. i think it's russian made. i know most ak/sks when shot multiple times in a row the barrel gets heated up and starts throwing rounds randomly, enough heat will warp the barrel. it is a used gun and he did get a good deal on it but how can you tell if the barrel is warped? and yes the scope was tightened and retightened before we went.