I'm looking at a 48 gun Fatboy Jr. model for my modest collection, and for other valuables and documents.
I have this exact safe. It's not big enough.
Based on the reported number, 48, I should be able to get 24 long guns on one side; I can't, you can't, no one could. If you didn't have any scopes or pistol grips or guns longer than 50.5", you might be able to squeeze more than I have in there, but you still won't get 24 on one side. Nope, not gonna happen. Just to get what I have in there, I have a couple in gun socks that are just leaning on each other and not in the designated spots. It's not the end of the world. Just know that 48 is a marketing number based on some kind of 4th dimension quantum physics, not reality.
Here's why I bought a Liberty Residential Security Container:
On Thanksgiving day, 2011, the owner of this safe was away from home. Nearest they can figure, the criminals had at least 3 hours to work on this safe. They didn't get in and none of the guns were stolen. I just happened to be in the store when this was delivered and got this pic. This is a Centurion which is their lowest end model. They had just brought this one back from replacing it for free.
While I was taking this pic, another guy walked in just fuming. He didn't have a Liberty safe and it wasn't bolted to the floor. Yep, he lost all his guns.
There are better, more secure safes, but not at this price. Pay the $200 or so to have it professionally installed. Your back will thank you and it will be placed right the first time.