I'm wondering how an SBR is 'all that much superior' to my 16" barrel AR15?
Or, are they for preppers for when the shtf scenarios or what?
There’s a lot of reasons. Take an AR pistol or SBR in 300BLK. BLK doesn’t need anything more that 9” in the barrel. That can be a pretty compact and potent combination. For one tax stamp, you can add a suppressor and be right around the size of your 16” AR.
For confined areas and your standard home, that’s more maneuverable than a 16” AR with a can on it.
The 5.56 pistol is too much compromise for me.