Most gun safes that are 30"+ wide have an adjustabe interior that can be Used to store all long guns or have a dividing wall that splits the safe in half and allows you to have 2 or three shelves. I'm not sure about your model, but some safes have a floor to ceiling shelf bracket system on each side that allow the interior shelves to be adjusted. You could easily do it without the side brackets. Start with a raised floor, space out the dividing wall and basically build a little bookshelf looking thing and drop it in on either side you prefer. Your safe is 21" wide, so I tend to thnk you may be wasting your time and would be better buying a bigger model or a matching one for all your other toys.
We recently threw out 12 gun safe interiors at work. Old gun safes didn't come with interiors standard. You had to buy them as an option and they were specific sizes depending if you ordered a firelining kit with the safe. They were taking up space for years with no hope of finding a home. :-/
We recently threw out 12 gun safe interiors at work. Old gun safes didn't come with interiors standard. You had to buy them as an option and they were specific sizes depending if you ordered a firelining kit with the safe. They were taking up space for years with no hope of finding a home. :-/