A bump on the head sends Hank Martin, 1905 auto mechanic, to Arthurian England, 528 A.D., where he is befriended by Sir Sagramore le Desirous and gains power by judicious use of technology. He and Alisande, the King's niece, fall in love at first sight, which draws unwelcome attention from her fiancée Sir Lancelot; but worse trouble befalls when Hank meddles in the kingdom's politics.

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.

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.

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.

Investigation by the Museum of Walloon Life showing the different stages of the manufacture of rifle barrels using the so-called "Damascus" process, in Nessonvaux in 1925 and 1931