I can't think of any instance where I'd need to fire a magazine and then pull the BCG, so that smacks of a gimmick to me.
I've literally never had an issue with DI-gassed weapons that wasn't related to a spring failure in the magazine. They simply don't cause issues for me.
TXARNG: 2007 - Present
"We're gonna turn left!!" - NASCAR, in a nutshell.