On my SKS that I bought I have cleaned every crevasse of cosmoline and while giving all the parts a once over I noticed the Piston rod doesn't slide that far out of the gas cylinder. The rod smoothly glides out about 1 1/8 inches before it abruptly stops and becomes to wedged to go out any farther. Is this normal for an SKS, or will i have to take off material of the rod?
http://http://imgur.com/0YoEkNa Pic to explain.
http://http://imgur.com/0YoEkNa Pic to explain.




















































