Very nice mag holders - BlackHawk Single Mag Cases Double Stack

I bought two of these to hold mags in my Blackhawk! Shoulder rig. They work well. There is a nice balance between the friction created by the internal plastic spring and the need to quickly access mags in emergency.
A sharp shake will dislodge a loaded double stack steel mag when held upside-down, but this is not a realistic test. I can’t foresee a situation when that kind of force would be applied when these are used on a belt or under my arm.