my range bag is probably different from most of you, as mine is clipped to my baby stroller gun cart with 4 aluminum snap links, and partially seated over the axle...it is currently an NRA promo that has circumference straps around the bottom, but occasionally is a Home Depot tool bag...
contents...200 rounds of 9mm in gallon zip loc bags... 3, 32 round +5 magazines, 3, 18 round magazines, mag loader, box factory 147, ear plugs, Mechanic's Gloves, chamber flags, T handle and chamber brush, M16 cleaning kit, bug juice, spare 2032 batteries and AR9 firing pin, lens cloth, Leatherman AR tool, Phillips, straight blade combo screwdriver, mag carrier, couple 2x2 non adherent gauze and roll of stretch self adherent tape
trauma kit... CAT tourniquet, hemostatic gauze, chest seal, 2 Israeli bandages, NPA, Kerlix gauze, Kerlix roll, self adherent stretch tape, petroleum gauze