The way I read this, is he suspects it would have just been a matter of time before his bolt fell apart anyway, even if he had never taken it apart.
The problems I see with this,
1) You're assuming that's what he meant
2) We will never know because he DID take it apart first
3) He hasn't posted back to say if he got it fixed and what he did, new bolt? proper fitting of the USGI parts? Assembled correctly?