https://www.youtube.com/watch?v=tXsCOCDM_mY
I use one of these for end feed fittings and burning kit. Bottom section is big enough for assembled Superfire & canister, big pot of Laco, couple of rolls of solder, burn mat and a fire extinguisher.
Top section can be removed and carried like a briefcase. Big enough to carry pretty much everything you need in 15, 22 and 28mm. Enough for a couple of system installs anyway.