This Adam Slingwein could use a little education which his NRA uncle appears to have neglected to provide. He would not get 50BMG rounds for $1 apiece, unless old military surplus. Precision rounds for Barrett would cost significantly more (he could get them, say, by disassembly, then size and weight standardization, then precision reassembly of the military ammo, or by de novo reloading). Then there is a minor problem with training: 2000 yards shooting ranges exist, but are far between, and so to properly master the Barrett he would have to spend significantly more than the cost of the rifle - add at least few more grand for ammo and transportation to and from the range.
so let me get this straight...
he supports owning weapons but he doesnt support owning ones he doesnt like the look of...
wow...lets add another ammendment..only pretty guns are allowed..or ones we all like