The Widowmaker (Widowmaker Series #1)

Jefferson Nighthawk, the greatest bounty hunter of his era, has been frozen for a century, awaiting a cure for the disease that riddles his body. Due to inflation, he no longer has the money to pay for the cryonics chamber, and to earn what he needs a clone is created and sent out on a high-paying mission. He has all of Nighthawk's physical abilities...but he's 2 months old, and there is a lot of evil abroad in the galaxy that he must adjust to on the spot.