Access the revolving insert from the side and reach any lens in seconds:
1:08 for a good demo of the revolving action.
I’m glad they didn’t call it an “Assault Backpack”. Really cool / functional looking idea.
The Revolver-8 PL revolving backpack is available over at Amazon for $249.
Might be worth looking into if you do a lot of photography and lens switching. If you google review on it, they all seem to be very positive.