I helped a coworker push a memo up the chain late last year requesting that we get away from flapped mag carriers and it crashed and burned.
Wasn't a big shock to me as my agency also won't allow grip tape or Talon grips. They recently authorized Hogue slip on grips but I never had much luck with those. I found that they would twist and interfere with the mag release so I ditched them. This was way back in the late 90s on my Gen 2 G23 for duty use.
I can live with the traditional magazine carriers.
Regards.