Which X-Men movie is about scientists operating on Wolverine? The movie starts with several mutants killing whoever they want, I forget, and there's a guy who's good with a gun.

The movie is called X-Men prequel: Wolverine The English name is X-man origins Wolverine The general plot is like this: Wolverine's life exploration, Wolverine's original name is James Hollatt, born in the late 1800s in Canada, a wealthy family, he was born weak but amazing bones, and his family is not harmonious, his father and grandfather have been having His father and grandfather were always at odds. As a result, young James was introverted and withdrawn. This calm and boring life, until one night, the gardener Logan drunken trouble, killed Wolverine's father, the pain of the loss of his father so that James inspired the body of the strange ability, he grew from the body by the bones of the formation of the "Bone Claw", James used the "Bone Claw" to kill Logan. James Jr. used his "bone claws" to kill Logan. His mother treats him like a monster, and his grandfather gives him some money to run away. So Junior fled to the mountains and found work in a lumberyard, changing his name to Logan. On the run Logan had always felt both fear and disgust at his natural psychic abilities and gave up on himself. Until once, he met in the forest and fell in love with an Indian woman Silver Fox, then the two of them were recruited to join the Canadian government's secret service organization, the secret service organization teammates saber-toothed tiger in Logan's birthday killed Silver Fox, since then the saber-toothed tiger and Logan knitted a great hatred, Logan swore to saber-toothed tiger and not **** wear days.　Time flies, the early 20th century, Logan returned to Canada to live in seclusion. General William Stryker on behalf of the U.S. government and the Canadian government collusion at this time, the establishment of the "Weapon X program", the purpose of this program is to transform mutants into government service weapons. Sabretooth Tiger and Logan joined the Weapon X program and both received body modifications. Logan named himself "Wolverine" and had his bones made indestructible and his natural bone claws turned into adamantium claws. The transformed Wolverine was also brainwashed by the "Weapon X" organization. After Wolverine woke up and killed the people of the "Weapon X" organization, Wolverine escaped, who knew that the saber-toothed tiger would come to kill him at this time, so Wolverine fought with the saber-toothed tiger, and Wolverine narrowly won the battle and then left. Afterwards, he met Professor X, and was taken in, and began his X-Men career.