The Puckle Gun, invented by James Puckle in 1694, was an early rapid-fire weapon introduced in London. This unique firearm featured interchangeable barrels designed with different ammunition types: one for Christians and another for enemies, like the Ottoman Turks. With a revolving chamber akin to a modern revolver, it offered faster firing than muskets. Demonstrated to investors and patented, it ultimately failed commercially due to complexity and practical doubts, but remains a significant step in weapon technology.