A speed loader for CYMA CM030 magazines. Integrated lock to keep BB's from feeding until you are ready to load the magazine. One load of BB's in the chamber loads one magazine with a couple of BB's or so to spare. I find it easier to load if you don't fill it to the brim.
Added a Loader with no lid and a separate Lid with no latch. N.B. I have not tried to print this new configuration.