A printed, double Talon magazine holder intended for mount on belts or vests for easy access, as any other similar design. A slightly more unique feature here is that you can top the magazines off while they're still in the holders: depress the top dart down on one side, and slide in a new dart from the other side.
Options for a belt specific or MOLLE mount are available. May not be compatible with all belt thicknesses.
Update: Altered MOLLE mount to be easier to install (aka: not almost impossible), the spacing was too close before.
The walls are only 2mm thick, you should have no major need for bridging so supports are unnecessary here.