Quote Originally Posted by Claven2 View Post
nother photo surfaced:

href="https://www.milsurps.com/images/imported/2011/03/_MG_1019-1.jpg" target="_blank">https://www.milsurps.com/images/imported/2011/03/_MG_1019-1.jpg

I now think the faliure originated on the left side lug, which broke completely off, and then propagated to a stress point at the base of the safety lug. Uneven bearing could be the culprit, IF it was VERY bad and the load was hot.
That still doesn't make a lick of sense to me! It appears the LH lug fracture passes through the entire structure, either originating or terminating at it's outboard side, rather than it's root. There ought to be no load concentration there. IF it's the fracture terminus, then it's at least slightly conceivable. But then the question arises- From whence and when did the failure originate? Peter Laidlericon's comments seem worth investigating, if possible.


Brian Dickicon's example, on the other hand, is quite "textbook". Very nice! No fault of the design, just the operator/reloader.