I don't wish to seem growly but if the BCG wasn't disassembled and various parts lubed with appropriate slickery stuff, it wasn't 'lubed'. I really am trying to sort out/solve your issues.
I assemble AR platform firearms to meet specific customer requests/needs so I get to handle lots of these. The primary issue I find is people believe all the stories brought back from 'the sandbox' by military users. Different environment, different use parameters, different logic vs the civilian recreational user.