A top Marine sniper, Bob Lee Swagger, leaves the military after a mission goes horribly awry and disappears, living in seclusion. He is coaxed back into service after a high-profile government official convinces him to help thwart a plot to kill the President of the United States. Ultimately double-crossed and framed for the attempt, Swagger becomes the target of a nationwide manhunt. He goes on the run to track the real killer and find out who exactly set him up, and why, eventually seeking revenge against some of the most powerful and corrupt leaders in the free world.

Vincent Miles, a gunsmith and shooting instructor at the National Police, is an expert in combat shooting who stubbornly refuses to join a field brigade, a choice which their colleagues do not understand. When he meets Milo Cardena, a mysterious and skilled cop, his life changes in such way that he cannot ignore his true nature anymore.

David Marshall Williams is sent to a prison farm where he works in the tool shop and eventually develops the precursor of the famous M-1 Carbine automatic rifle used in World War II.

English gunsmith Jonathon Tibbs travels to the American West in the 1880s to sell firearms to the locals. He inadvertently acquires a reputation of quickness on the draw due to his wrist mounted Derringer style weapon. Soon gaining the post of sheriff, he endeavours to clean up the town using what skills he has—and by multilateral diplomacy.