The Semmerling LM4 is a five-shot, manually repeating

double-action Double action (or double-action) refers to one of two systems in firearms where the trigger both cocks and releases the hammer. * Double-action only (DAO) firearms trigger: The trigger both cocks and releases the hammer. There is no single-action ...

pocket pistol In American English, a pocket pistol is any small, pocket-sized semi-automatic pistol (or less commonly referencing either derringers, or small revolvers), and is suitable for concealed carry in either a coat, jacket, or trouser pocket. Pocket ...

Concept and History

The Semmerling series of pistols included the LM1, LM2 (.380 ACP semi-automatic variant), LM3 and the XLM (.45 ACP semi-automatic variant) and LM4. The only version available to the public was the LM4, which was first designed and manufactured in the US in the early 1980s and marketed at a price of

US$ The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...

645. The "LM" in the model numbers stands for "Lichtman Model", after the inventor of the design, Philip R. Lichtman. Lichtman applied for and received at least four United States Patents related to the design. The goal of the LM4 was to achieve a combination of the highest practical firepower in as small and light a gun as possible, so as to be easily concealable. This was approached by selecting the service

caliber In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms) , bore – regardless of how or where the bore is measured and whether the f ...

.45 ACP The .45 ACP ( Automatic Colt Pistol) or .45 Auto (11.43×23mm) is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol. After successful military trials, it ...

for its proven

stopping power Stopping power is the ability of a weapon – typically a ranged weapon such as a firearm – to cause a target (human or animal) to be incapacitated or immobilized. Stopping power contrasts with lethality in that it pertains only to a weapon's ...

and opting for a manual repeating mechanism to minimize bulk and weight and ensure flawless operation in the most difficult situations. Because of this the LM4 was first offered to the

U.S. Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cl ...

and government agencies. The Semmerling LM4 is simple, having only 33 parts (including screws). The original design called for every part except for the springs to be made of S-7

tool steel Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive har ...

. Every pistol was Magnafluxed (a method of testing

ferrous In chemistry, the adjective Ferrous indicates a compound that contains iron(II), meaning iron in its +2 oxidation state, possibly as the divalent cation Fe2+. It is opposed to "ferric" or iron(III), meaning iron in its +3 oxidation state, such a ...

metals for surface and subsurface flaws) twice in their assembly. Each pistol was essentially handmade to order with production averaging a little over ten pieces a month. Of the LM4 model, only about 600 were ever produced. Although the Semmerling was intended as a back-up pistol for those most at risk of having their primary weapon taken from them, some adopted the pistol as a "hide-out" weapon. It is capable of a "shot-a-second" firing rate. With the magazine loaded and a round in the chamber, the Semmerling LM4 is capable of carrying five .45 ACP rounds. During 2005, the largest collections of Semmerlings comprising examples of the LM1, LM2, LM3, LM4 and the XLM along with all prototypes, tooling, drawings, production and testing equipment, advertising materials and leather accessories were provided to the

National Firearms Museum The NRA National Firearms Museum is a museum located at the NRA Headquarters Building in Fairfax County, Virginia. Approximated 2,500 guns are displayed in 15,000 square feet. The NRA National Firearms Museum is operated by the Museums Division of ...

, the

Cody Firearms Museum The Buffalo Bill Center of the West, formerly known as the Buffalo Bill Historical Center, is a complex of five museums and a research library featuring art and artifacts of the American West located in Cody, Wyoming. The five museums include the ...

and the Smithsonian. The XLM was a military contract for an automatic version (not manually operated), making the Semmerling XLM the smallest .45 ACP semi-automatic pistol ever produced. The XLM was based on the LM4 and utilized a "strip forward" barrel that moved forward and was returned to battery by spring power. The XLM also had a threaded barrel with a slide lock allowing for suppressed operation both in semi and quieter non-actuating mode. SEMMERLING XLM

stainless steel Stainless steel is an alloy of iron that is resistant to rusting and corrosion. It contains at least 11% chromium and may contain elements such as carbon, other nonmetals and metals to obtain other desired properties. Stainless steel's corros ...

version, not part of the Semmerling Corporation's efforts, has been available at request from the

American Derringer American Derringer Corporation is an American manufacturer of firearms, based in Waco, Texas. The company was founded by Robert A. Saunders and Elizabeth Saunders in 1980 and makes a variety of derringers and small pocket pistols. History Founde ...

corporation since about 1995. Phillip Lichtman died on June 28, 2017. PHILLIP LICHTMAN AKA SEMMERLING

Finish and accessories

The original standard color was matte black with highly polished slide frames. A complete high polish blued finish or a hard

chrome plating Chrome plating (less commonly chromium plating) is a technique of electroplating a thin layer of chromium onto a metal object. A chrome-plated item is called ''chrome''. The chromed layer can be decorative, provide corrosion resistance, ease ...

were optional. A factory presentation model was produced with a high polished gold plated slide.

Grips

* Plastic *

Ebony Ebony is a dense black/brown hardwood, coming from several species in the genus ''Diospyros'', which also contains the persimmons. Unlike most woods, ebony is dense enough to sink in water. It is finely textured and has a mirror finish when pol ...

Cocobolo Cocobolo is a tropical hardwood of Central American trees belonging to the genus ''Dalbergia''. Only the heartwood of cocobolo is used; it is usually orange or reddish-brown, often with darker irregular traces weaving through the wood. The heartw ...

* "Thin kit": steel side plate * Dot fastners: installed in grip panel screws to use with spring steel belt "holster" for concealment

Accessories

* Optional two-stage

trigger Trigger may refer to: Notable animals and people ;Mononym * Trigger (horse), owned by cowboy star Roy Rogers ;Nickname * Trigger Alpert (1916–2013), American jazz bassist * "Trigger Mike" Coppola (1900–1966), American gangster ;Surname * Bru ...

* Gun

holster A handgun holster is a device used to hold or restrict the undesired movement of a handgun, most commonly in a location where it can be easily withdrawn for immediate use. Holsters are often attached to a belt or waistband, but they may be att ...

* Magazine holster * Skeleton "thin kit" grip, allowed for round counting * Minor replacement parts kit * Major replacement parts kit

Operation

The Semmerling fires from a static, fully locked

breech Breech may refer to: * Breech (firearms), the opening at the rear of a gun barrel where the cartridge is inserted in a breech-loading weapon * breech, the lower part of a pulley block * breech, the penetration of a boiler where exhaust gases leav ...

, producing considerable

recoil Recoil (often called knockback, kickback or simply kick) is the rearward thrust generated when a gun is being discharged. In technical terms, the recoil is a result of conservation of momentum, as according to Newton's third law the force requ ...

. The

barrel A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden staves and bound by wooden or metal hoops. The word vat is often used for large containers for liquids, ...

mechanism is manually pulled forward to eject the fired round, then pushed back to

chamber Chamber or the chamber may refer to: In government and organizations * Chamber of commerce, an organization of business owners to promote commercial interests *Legislative chamber, in politics * Debate chamber, the space or room that houses delib ...

the next round. This can be accomplished by thumb. For carry, the slide is locked in the closed position by means of a tiny lever located in the middle of the weapon. By carefully pulling the trigger back approx. 1/4 inch and pressing on the lever, the lever clicks into "lock" mode. Hold the lever down and release the trigger. The Semmerling's action is now locked closed with a round in the chamber. To fire, the trigger is pulled back fully. When there is a cartridge in the chamber, the extractor protrudes 1/8 of an inch, so as to act as

loaded chamber indicator file:M16A2 Safety Closeup.jpg, Close-up shot of a safety of an M16 rifle, M16A2 rifle In firearms, a safety or safety catch is a mechanism used to help prevent the accidental discharge of a firearm, helping to ensure safer handling. Safeties ca ...

. It has no

safety Safety is the state of being "safe", the condition of being protected from harm or other danger. Safety can also refer to risk management, the control of recognized hazards in order to achieve an acceptable level of risk. Meanings There are ...

decocker Close-up shot of a safety of an M16A2 rifle In firearms, a safety or safety catch is a mechanism used to help prevent the accidental discharge of a firearm, helping to ensure safer handling. Safeties can generally be divided into subtypes su ...

, or

slide release A slide stop, sometimes referred to as a slide lock or slide release, on a semi-automatic handgun is a function that visually indicates when a handgun has expended all loaded ammunition and facilitates faster reloading by pulling back the slide ...

. The number of remaining rounds could be seen by using the "thin grip" kit or by removing the grips when carrying the LM4.

Semi automatic variant

A semi-automatic variant known as the Lichtman Model Semmerling 3 was developed as a back up pistol intended for the US Armed forces. This variant differs to the Semmerling LM4 as it uses simple blowback operation and notably has an underbarrel design.

References

External links

Product description of the American Derringer Reissue at their corporate site

The Long Arm of the Law Exhibit at the National Firearms Museum

Patent for "HAND GUN", Patented Mar 11, 1975

Patent for "FIREARM", Patented Dec 31, 1974

Patent for "Manually cycled pistol", Patented May 22, 1979

Patent for "Manually cycled pistol", Patented August 3, 1982

Patents

* * *{{US Patent, D234458 .45 ACP firearms Pistols of the United States Abandoned military projects of the United States