Nothing major, just the roll pin for the forward assist pawl.   I have put over 600 rounds through it total.  I wa sshooting it monday and went to charge a mag and the bolt got stuck back with the carrier in the buffer tube.  It was kind of a pain to get apart because of the bolt being stuck back.  I can't complain about the rifle though otherwise, has been flawless until now.   Just wondering if anyone else has had this type of failure.

I thought you were going to say a bolt or extractor! Roll pin for the forward assist sounds easy enough to fix.

Thank heavens you werent on your way to your stand

Actually that was what I thought when it happened before I looked at it since ther is not a lot of meat in the area of the lugs.  When I looked in the ejection port and saw them all there I was pretty happy.  The pawl was kind of beat up so I just replaced the whole FA assembly today, easy and cheap.  I still am quite happy with the rifle and is probably my favorite ar to shoot.  It's a toss up between that and my 308 DPMS.  The 458 is cooler, but the 308 shoots so well at 2-300 yards (well under MOA with my handloads) that it gives it a run for it's money.