Storage and transport are 2 different things.
In terms of transporting, it's hopeless to try to transport everything, but fisherman's tackle boxes are quite good for these types of things. But you'll soon learn to just pack an extra gun rather than pack the tools and parts required to fix busted-on-the-field guns.
Small arts and craft boxes are great for the small bits (gears, nozzles, bushings/bearings, plugs, wiring, etc) and the short, flat storage boxes found at Home Depot work well for storing the larger pieces.
The Steve has spoken.