Mr. Murray sells a fine product. My Norinco SKS just loved civilian ammo so much it proceeded to eat as much as it could at one pull of the trigger. I placed an order with Mr. Murray and had the enhanced firing pin(with an extra spring included) in a couple of days. It works just as advertised and installation was straight forward. No more double triples.
http://www.murraysguns.com/sksown.htm
Hobie