I have a Dillon Discreet Briefcase. Size zippered pocket for pistol access. I keep a SureFire G2X / spare batteries. Two knives, fire kit, 2 spare magazines in pouches, foam ear plugs, Gerber Multi-Tool, Braided camo Para-Cord my Grandson made for me, and a holster for the pistol.
It has room for a notebook and file folders if I need to visit a customer.
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NRA Certified Instructor