I just ordered a maxpedition gtg and their concealment holster. I am planning on setting it up as an edc or active shooter bag. I plan on having a small trauma kit in it as well as a gun of some sort w/ ammo and possibly a 20rd ar mag or two. multi tool will probably be thrown in as well. unfortunately i cant go with a bigger bag since it will spend a lot of time in my work locker and its already packed with work junk. Any ideas of extra doodads to throw in to help in a oh $h17 moment?