I WAS EXPECTING AN EARTH-SHATTERING KABOOM: Gun company displays largest-caliber rifle ever created with bullets that cost $40 a piece. “The rifle fires rounds about 2,100 feet per second with roughly 254,000 foot-pounds of muzzle energy.” So, an even better anti-Terminator weapon than the Tactilite .50 BMG. But while I fired the .50 from the shoulder, I’m not sure I’d want to do that with this gun.