I say I won't need one. In fact I say most people in America won't need one. By and large the army has considered a .50 caliber machine gun to be too heavy to have infantry men carry around. What practical use is would most people have for an 83 lb gun that to even use requires a tripod that adds an additional 44?
Well, that's not a machine gun, it's a single shot long distance rifle. .50 BMG. You never know when or if you'll need one. I can't type what practical use you'll need it for because the DHS could read the post and suspend many of my Constitutional rights under the Patriot Act.
MacMillan does but I'm not sure if it's sold to the general public. I live in California and it's illegal to even get a .50 BMG here, the laws will be different where you are. Unless you're in New York.