12-12-2023, 06:33 PM
Interesting observation.......I pulled the BCG and charging handle last night. I'd planned to reapply lube and work the bolt by hand for a while to see if things started to smooth out. I had the upper receiver upside down and notice some white-ish residue in the channel the charging handle rides in......added a drop of CLP and rubbed a patch across it several times with a pick. Not sure what it was, but it was fairly hard and kinda crusty. Once removed, running things by hand felt a lot smoother. Not sure this really changes my failure to lock open on empty situation, but I sure feel better about things. That crust was slowing things down enough that the bolt would not go completely into battery when working things by hand.....once removed, slid right into place like it should.