IMHO, no other reason for this to exist other than 'One upsmanship'. I guess if you live in a region prone to attack by rabid Brown Bears, or have a problem with Rosie O'Donnell persistently rooting thru your garbage then get it, if they really intrigue you go for it. Ammo is expensive, even reloading for it is costly.
Of course I scoffed at people who bought Microsoft stock at the IPO, "Personal Computers, bahh, what a joke"....so take my advice with large grains of salt.
Seriously, if you want it, get it. Life is short, enjoy.
RD

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Got a Phd from Hard Knocks U