I was actually wondering if it was really solved... That snap ring has bupkis to do with locking open... First thing I would check is that little tab on the upper surface of the bolt release button that interacts with the latch trip.. If off a bit (angle) it can do what you describe.. Could be a few other things: bent pin on the latch pivot.. The need to remove a couple .000s where the carrier release tab locks into place..
In any case, IMHO the problem is in that area - between the release button and the carrier latch system..
Last edited by Redneck; 12/16/19.
