Well...
We don't really have to have Austrians for it to be a viable addon. For instance, the united States armed forces, particularly the Special Operations Command use weapons from many different countries... too many to list.
Terrorists can buy, borrow, and steal just about anything they want/need. Al Quaida for instance, was very well funded with a budget estimated to be more than a hundred million dollars per year. Ten or even twenty thousand dollars for such a weapon as this, is a good trade for a twenty million dollar tank or helocopter, or even a parked bomber ( A B-2 costs more than a billion dollars per plane. ) What about a shot at the Afghan President Karzai, in his heavily armored SUV with US SEAL DEVGRU bodyguards... now thats a great idea for a OFP mission!
I might have to take back my earlier statement about it being too much for use as an anti-personel weapon... so is the .50 BMR rifles such as the Barret and the Russian V94. And the fact it fires a fin stabilised dart makes it very accurate as well. Sub-MOA groups at two miles might even be possible.
BTW, lets not forget work is being done and progress made on a guided projectile, known as BLAM. Go here for info:
http://www.eng.auburn.edu/department/ae/labinfo/AAL/blam_concept.htmlAnd speaking of prototypes, so is the V-80 ( KA-50 Blackshark ) OFFICIAL addon from BIS. All weapon systems were a prototype before they were put into production, thats just basic manufacturing.
Sure, it could be a fairly viable addon. Any takers...?