Automatic revolver
A revolver that automates cocking and cylinder rotation using recoil energy.
An automatic revolver, also called a semi-automatic revolver, uses the recoil from firing to cock the hammer and rotate the cylinder, eliminating the need to do these steps by hand. Like other semi-automatic firearms, the shooter must pull the trigger for each shot. True examples of this type are very rare, and the term is often misused for break-open revolvers that have a mechanical ejector which automatically clears spent and live casings from the cylinder when the breech is opened.
The concept of an automatic revolver was first filed with patent agent Moses Poole in 1841. The actual inventor is unknown, but it was likely Frenchman Philippe Mathieu, who had patented a nearly identical design two years earlier. Another design was submitted to British patent agent William Edward Newton by Americans Mershon and Hollingsworth in 1854. Both of these early weapons used clockwork mechanisms for automatic operation. In 1863, Spanish gunsmith Orbea designed a gas piston-operated revolver. The Webley-Fosbery Automatic Revolver, designed in 1895, became the first commercially available and best-known semi-automatic revolver.
A standard revolver is manually operated: cocking the hammer advances the cylinder in single-action, or pulling the trigger both advances the cylinder and cocks the hammer in double-action. An automatic revolver automates both tasks, removing the need to manually cock the hammer between shots while keeping the lighter trigger pull of a single-action. This is achieved with a reciprocating slide on the upper frame, whose motion rotates the cylinder and cocks the hammer, similar to many semi-automatic pistol designs.
Notable examples include the Norwegian Landstad revolver from 1900, which had a flat, two-chambered cylinder. The bottom chamber was loaded from a sideways-inserted magazine that also served as the left grip plate. After firing, a reciprocating bolt extracted and ejected the round from the top chamber, loaded a fresh round into the bottom chamber, and rotated the cylinder. It used the 7.5mm Nagant cartridge. The Webley-Fosbery, introduced in 1901, was recoil-operated: the cylinder and barrel moved backward to cock the hammer and rotate the cylinder. Cam grooves on the cylinder’s exterior advanced it half a turn on the backward stroke and half a turn on the forward stroke.
- First known design
- 1841, communicated to Moses Poole; likely inventor Philippe Mathieu
- First commercial example
- Webley-Fosbery Automatic Revolver, introduced 1901
- Notable models
- Webley-Fosbery, Landstad, Union, Zulaica, Mateba Unica
- Calibers
- .357 Magnum, .44 Magnum, .454 Casull (Mateba); 7.5mm Nagant (Landstad); .22 LR (Zulaica); .38 and .455 (Webley-Fosbery)
- Production numbers
- Webley-Fosbery: ~4,750; Union: ~65; Zulaica: few manufactured
Lore & Background
The concept of an automatic revolver dates to 1841, when a design was communicated to patent agent Moses Poole; the inventor was likely Frenchman Philippe Mathieu, who had patented a nearly identical design two years earlier. Another automatic revolver was communicated to British agent William Edward Newton by Americans Mershon and Hollingsworth in 1854. Both used clockwork for automatic operation. In 1863, Spanish gunsmith Orbea designed a gas piston-operated revolver. The Webley-Fosbery Automatic Revolver, designed in 1895, became the first commercial and best-known semi-automatic revolver, introduced in 1901. It was recoil-operated, with the cylinder and barrel recoiling backward to cock the hammer and revolve the cylinder via cam grooves on the cylinder's exterior. The Norwegian Landstad revolver (1900) featured a flat two-chamber cylinder loaded from a sideways-inserted magazine serving as the left grip plate. The Union Automatic Revolver (American) had only about 65 examples made. In 1905, Zulaica y Cia. of Eibar, Spain, patented an unusual .22 LR automatic revolver, but few were manufactured. In 1997, Mateba developed the Unica auto-revolver, a recoil-operated design holding six or seven cartridges, available in .357 Magnum, .44 Magnum, and .454 Casull.
Reader's Guide
The automatic revolver represents a rare and technically intriguing attempt to combine the revolver's cylinder system with the self-loading action of semi-automatic pistols. Its significance lies in its mechanical ingenuity: automating the rotation and cocking while preserving a lighter single-action trigger pull. The Webley-Fosbery, the most commercially successful example, saw limited production of around 4,750 units, and its distinctive cam-groove cylinder design remains notable. The Landstad revolver's flat two-chamber cylinder and magazine-integrated grip were highly unconventional. The Union and Zulaica models were produced in very small numbers, making them collector's items. The Mateba Unica, introduced in 1997, revived the concept with modern materials and calibers, including rifle-like variants. Despite their rarity, automatic revolvers have influenced firearm design by demonstrating that revolver mechanisms could be adapted to semi-automatic operation, though the complexity and limited advantages kept them from widespread adoption. Their legacy is primarily as curiosities of engineering and as sought-after collectibles.
Did You Know?
- The first known automatic revolver design was communicated to patent agent Moses Poole in 1841, likely by French inventor Philippe Mathieu.
- The Webley-Fosbery Automatic Revolver, introduced in 1901, used cam grooves on the outside of the cylinder to rotate it.
- The Norwegian Landstad revolver had a flat cylinder with only two chambers and loaded from a magazine that also served as the left grip plate.
- The Mateba Unica auto-revolver, introduced in 1997, was available in calibers up to .454 Casull.
Frequently Asked Questions
What is an automatic revolver?
An automatic revolver is a handgun that harnesses the recoil of each shot to mechanically cock the hammer and swing the cylinder to the next chamber on its own. The shooter still pulls the trigger for every round, but the manual cocking step is eliminated entirely.
Who invented the automatic revolver and when did it first appear?
The earliest known design was submitted to patent agent Moses Poole in 1841, and Philippe Mathieu is generally regarded as the probable inventor behind it. The first commercially available example, the Webley-Fosbery Automatic Revolver, did not reach the market until 1901.
What are the most notable automatic revolver models?
Collectors most often cite the Webley-Fosbery (roughly 4,750 units), the Landstad, the Union (about 65 made), the Zulaica (only a handful produced), and the Mateba Unica. The Mateba stands out for its ability to fire high-powered cartridges such as the .357 Magnum, .44 Magnum, and .454 Casull.
Why are true automatic revolvers so rare?
The internal mechanism required to convert recoil energy into hammer-cocking and cylinder-rotation is mechanically demanding, which kept production volumes very low across every known model. The term is also frequently misused to describe break-open revolvers that merely feature a mechanical ejector, further muddying what actually counts as a genuine automatic revolver.
What calibers do automatic revolvers come in?
Depending on the make, they span a wide range: the Zulaica fired .22 LR, the Landstad used 7.5mm Nagant, the Webley-Fosbery handled .38 and .455, and the Mateba Unica accepted .357 Magnum, .44 Magnum, or .454 Casull.
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