the Jarre harmonica gun were produced that had a sliding magazine. The sliding magazine contained pinfire cartridges or speedloaders. The magazine needed to be moved manually in many designs, hence distinguishing them from semi-automatic pistols. Lever-action Lever action pistols are very rare, the most notable of which is the Volcanic pistol. Gallery of evolution of pistols over 400 years See also Glossary of firearms terms List of pistols Pistol grip Water gun, including water pistol and squirt gun References Handguns 16th-century introductions