Life Usage of Bolts and Extractors?

[Lastrites]

What about gas rings? I think I need to do a better job lubing the inside of the carrier. I have two bolts that won't support the weight of the carrier when stood vertically on the bolt face.

That's not how the manual states to test, if I recall correctly you do not set the bcg down on a table to see if it holds, but rather just turn the bcg facing down to see if the bolt slides out by the weight of the bolt itself. I have it saved somewhere on this laptop, I'll try to find it.