Against all odds

the long version

"He didn't even carry a gun, it wasn't necessary when he was so good with his fists. But after a fatal altercation with a proddy kid he began to see he was perhaps too good, especially as the boy had a mighty powerful father and brother who would be waiting for him when he was finally released from prison. It seemed like the moment to start packing a gun - a very special kind of gun. He needed all the advantage he could get as he was only one man against many. Someone had to die to even up the odds"--Publisher's description.