How were the bison hunted to extinction?

Bison were not hunted to extinction. They were hunted almost to extinction by use of repeating rifles, revolvers, pistols, and a lot of willing participants who weren't squeamish nor hesitant about shooting an animal were it stood. Bison could be shot from the passenger cars of a train, from horse-back and from a hide-out in a coulee. Many of those who shot bison were veterans from the Civil War out to make a quick buck on the number of bison they took down so that the hides could be collected and sold for a profit.