Myself.. I keep them in my display/Storage room I built off my home office :tup:
I have an office downstairs, and with access only from my office, It leads into my display room. I reserve my safe's for my real steel as you can see by the pics. I have 24 hr monitored alarm system built into the house. I have double locking office doors to my office, and another locking door from my office to the display room. No windows or access anywhere to the display room. Keep all my gear, airsoft, and real steel overflow ammo!