Another...just for fun question, for interchangeable barrel guns

I have seen this picture a couple times but don’t really know the story behind it
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Beside the Germans, the Myth Busters did a series of bends years back.

Using a .22, their first bend was 15°, then to 45°, then to 90°, then to 180°. All different/new barrels.
Don't recall exactly, but I think that they only lost something like 30 or 40fps from straight to 180°. All bullets went through a piece of ballistic gelatin about 10" or 12 " thick.

I'd say that the target gun above might work except for the first, almost 90° bend. Seems awful sharp !

Mike