Got my M50 at KCR from OOW in 2003ish; I had put about 6,000 rounds through it before the pin broke The pin from "birth" was a clean break (see attached photo). I was firing at the range and it just stopped; shaking the gun made a distinctive clacking sound; came home and discovered a freshly shortened pin. Replaced with titanium pin from GunBroker auction. That was 2012 when it broke; just put 200 rounds through it today. Maybe now at another 4,000 for a total of 10,000 rounds total in my life. The pin and the action bar have failed. Otherwise.... I love mine. She's old but she can certainly rock and roll.