Who has time to replace broken parts in a no-shit SHTF scenario? I'd be ditching broke guns for working guns I'm pulling off dead bodies. Or at least salvaging parts I need like complete uppers. :help: Not saying KACs are infallable, but the reason why we invest in these systems is because it's an improvement on a proven design with components designed to significantly outlast their non-proprietary counterparts. If all hell break loose and my E3 takes a shit and I don't have any spare parts on hand... well then I guess I can think back to this thread and say to myself "You know, they were right.", before I pull out the Sig and go out in a blaze of glory...
All fantasy BS aside, and as previously stated, the proprietary parts argument is a non-argument. Do what you like.

