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Flapper Locking
Flapper locking is a type of locking mechanism used in self-loading firearms. It involves a pair of flappers on the sides of the bolt that each lock into an outwards recess in the receiver as the bolt is in battery. As the bolt is forced backwards after the firing of a cartridge, the flappers recede back into the bolt, therefore unlocking and sending the bolt backwards to cycle the gun. The design was patented in 1870 by Lieutenant Friberg of the Swedish Army, but the first actual example of a firearm that used this was made by another Swedish man named Kjellman in 1907. Most use of flapper locking came from the designs of the Soviet Union's Vasily Degtyaryov in the years surrounding World War II. Examples *Gewehr 41 (Walther) *Gewehr 43 *Degtyaryov machine gun *RPD machine gun *DShK *EM-2 rifle *AVS-36; used as secondary locking *MG 51 *Mauser 1906/08 pistol and 1905/06 rifle See also *Roller locked (similar) *Rotating bolt *Bolt action Bolt-action is a type of manual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vasily Degtyaryov
Vasily Alekseyevich Degtyaryov (russian: Васи́лий Алексе́евич Дегтярёв; 2 January 1880, Tula – 16 January 1949, Moscow) was a Soviet and Russian engineer who specialized in weapons design. He was awarded the title of Hero of Socialist Labour in 1940. Biography He was a factory worker at the Tula Arms Plant.Дегтярёв Василий Алексеевич // Большая Российская Энциклопедия / редколл., гл. ред. Ю. С. Осипов. том 8. М., научное издательство "Большая Российская Энциклопедия", 2007. He became married in 1905. Starting in 1918, Vasily Degtyaryov headed the first Soviet firearms design bureau at Kovrov Arms Factory. In 1927, the Red Army was equipped with his 7.62 mm light machine gun DP-27. This design led to the development of the DT tank machine gun (1927) and two aircraft machine guns: DA and DA-2 (1928). In 1940 he became a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gewehr 41
The Gewehr 41 (German for: rifle 41), commonly known as the G41(W) or G41(M), denoting the manufacturer (Walther or Mauser), are two distinct and different battle rifles manufactured and used by Nazi Germany during World War II. They were largely superseded by the Gewehr 43, which was derived from the G41(W), but with an improved gas system and other detail changes. Background By 1940, it became apparent that some form of a semi-automatic rifle with a higher rate of fire than existing bolt-action rifle models were necessary to improve the infantry's combat efficiency. The Army issued a specification to various manufacturers, and Mauser and Walther submitted prototypes that were very similar. However, some restrictions were placed upon the design: * no holes were to be bored into the barrel for tapping gas for the loading mechanism; * the rifles were not to have any moving parts on the surface; * and in case the auto-loading mechanism failed, a bolt action was to be included. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gewehr 43
The Gewehr 43 or Karabiner 43 (abbreviated G43, K43, Gew 43, Kar 43) is a 7.92×57mm Mauser caliber semi-automatic rifle developed by Germany during World War II. The design was based on that of the earlier G41(W), but incorporated an improved short-stroke piston gas system similar to that of the Soviet SVT-40. It was manufactured using innovative mass-production techniques. History Germany's quest for a semi-automatic infantry rifle resulted in two designs – the G41(M) and G41(W), from Mauser and Walther Arms respectively. The Mauser design was introduced in 1941 and at least 12,755 were made, but it proved unreliable in combat. The Walther design fared better in combat but still suffered from reliability problems. The problems with both designs stemmed from a demand made by the Army that the rifles would not use holes drilled into the barrel, known as ''gas ports'', to run the automatic loading mechanism. Meeting this requirement meant the designs had to use uncommon mec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degtyaryov Machine Gun
The Degtyaryov machine gun (russian: Пулемёт Дегтярёвa Пехотный, Pulemyot Degtyaryova Pekhotny literally: "Degtyaryov's infantry machine gun") or DP-27/DP-28 is a light machine gun firing the 7.62×54mmR cartridge that was primarily used by the Soviet Union, with service trials starting in 1927, followed by general deployment in 1928. Besides being the standard Soviet infantry light machine gun (LMG) during World War II, with various modifications it was used in aircraft as a flexible defensive weapon, and it equipped almost all Soviet tanks in WWII as either a flexible bow machine gun or a co-axial machine gun controlled by the gunner. It was improved in 1943 producing the DPM, but it was replaced in 1946 with the RP-46 which improved on the basic DP design by converting it to use belt feed. The DP machine gun was supplemented in the 1950s by the more modern RPD machine gun and entirely replaced in Soviet service by the general purpose PK machine gun in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RPD Machine Gun
The RPD (russian: ручной пулемёт Дегтярёва, Ruchnoy Pulemyot Degtyaryova, English: Degtyaryov hand-held machine gun) is a 7.62x39mm light machine gun developed in the Soviet Union by Vasily Degtyaryov for the 7.62×39mm M43 intermediate cartridge. It was created as a replacement for the DP machine gun chambered for the 7.62×54mmR round. It is a precursor of most squad automatic weapons.Woźniak, Ryszard: ''Encyklopedia najnowszej broni palnej—tom 4 R–Z'', page 32. Bellona, 2002. It was succeeded in Soviet service by the RPK. History Work on the weapon commenced in 1943. Three prominent Soviet engineers were asked to submit their own designs: Vasily Degtyaryov, Sergei Simonov and Alexei Sudayev. Among the completed prototypes prepared for evaluation, the Degtyaryov design proved superior and was accepted into service with the Soviet armed forces as the 7.62 mm Ручной Пулемёт Дегтярёва, PПД (RPD, ''Ruchnoy Pulem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DShK
The DShK 1938 (Cyrillic: ДШК, for russian: Дегтярёва-Шпагина Крупнокалиберный, Degtyaryova-Shpagina Krupnokaliberny, links=no, "Degtyaryov-Shpagin large-calibre") is a Soviet heavy machine gun with a V-shaped butterfly trigger, firing the 12.7×108mm cartridge. The weapon was also used as a heavy infantry machine gun, where it was frequently deployed with a two-wheeled mounting and a single-sheet armour-plate shield. The DShK's name is derived from its original designer, Vasily Degtyaryov, and Georgi Shpagin, who later improved the cartridge feed mechanism. It is sometimes nicknamed Dushka (a dear or beloved person) in Russian-speaking countries, from the abbreviation. Alongside the American M2 Browning, the DShK is the only .50 caliber machine gun designed prior to World War II that remains in service to the present day. History Requiring a heavy machine gun similar to the M2 Browning, development of the DShK began in the Soviet Union in 1929 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EM-2 Rifle
The EM-2, also known as Rifle, No.9, Mk.1 or Janson rifle, was a British assault rifle. It was briefly adopted by British forces in 1951, but the decision was overturned very shortly thereafter by Winston Churchill's incoming government in an effort to secure NATO standardisation of small arms and ammunition. It was an innovative weapon with the compact bullpup layout, built-in carrying handle and an optical sight. The gun was designed to fire one of the first purpose-designed entirely new intermediate cartridges, designed to a 1945 requirement as a result of combat experience and German advances in weapons design during World War II. The round, the .280 British, was designed to replace the .303 round, which dated to the late 19th century. The EM-2 was intended to replace the Lee-Enfield bolt-action rifles and various submachineguns, while the TADEN would replace the Bren gun and Vickers machine gun. As part of NATO standardization efforts, the United States claimed the .280 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AVS-36
The AVS-36 (from ''Avtomaticheskaya Vintovka Simonova 1936 model''; russian: Автоматическая винтовка Симонова образца 1936 года (АВС-36)) was a Soviet automatic rifle which saw service in the early years of World War II. It was among the early selective fire infantry rifles (capable of both single and full-automatic fire) formally adopted for military service. History Origins The designer, Sergei Simonov, began his work on a gas-operated self-loading rifle in 1930. The first prototype was ready in 1931 and appeared promising. Three years later a trial batch of an improved design was made. In 1935, a competition between Simonov's design and a rifle made by Fedor Tokarev was held. The Simonov rifle emerged as the winner and was accepted into service as the AVS-36. The AVS-36 was first seen in public in the 1938 May Day parade in Moscow, when it was displayed by the marching 1st Rifle Division. The American public became aware of it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MG 51
The ''7.5 mm Maschinengewehr 1951'' or Mg 51 is a general-purpose machine gun manufactured by W+F of Switzerland. The weapon was introduced into Swiss service when the Swiss Army initiated a competition for a new service machine gun to replace the MG 11 heavy machine gun and the Furrer M25 light machine gun adopted in 1911 and 1925 respectively. History Around 1942 the Swiss army initiated a competition for a new service machine gun to replace both the “heavy” MG 11 and the “light” Lmg25, adopted in 1911 and 1925 respectively. According to the specifications of the ''Kriegstechnische Abteilung'' (KTA) (War Technology Department), the maximum cyclic rate of fire of 1,000 rounds per minute should not be exceeded. Three participants joined the competition–government-owned Waffenfabrik Bern, and privately owned factories SIG and Hispano-Suiza. Waffenfabrik Bern based its development on the hugely successful World War II German MG 42 and its accessories. The fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roller Locked
In firearms operating systems, the term roller locked refers to locking the bolt with Rolling-element bearing, rollers. Notable examples of firearms using this method are the MG 42 general-purpose machine gun, and the CZ 52 semi-automatic pistol. It was also applied in the experimental Gewehr 43#Gerät 03 prototype, ''Gerät 03'' semi-automatic rifle and ''Gerät 06'' and EM-2 rifle#Background, EM-1 experimental assault rifles. The MG 42's lineage continued past World War II, forming the basis for the nearly identical MG1 (MG 42/59), chambered in 7.62×51mm NATO, which subsequently evolved into the MG1A3, and later the Bundeswehr's Rheinmetall MG 3, MG 3, Italian MG 42/59 and Austrian MG 74. It also spawned the Yugoslav unlicensed nearly identical Zastava M53. History Origin of the roller-locking is debated: even though the general principle of utilizing "ball bearing parts" under radial pressure "for preventing uncoupling of the coupling members" was known no later than 1910s, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rotating Bolt
Rotating bolt is a method of locking the breech (or rear barrel) of a firearm closed for firing. Johann Nicolaus von Dreyse developed the first rotating bolt firearm, the "Dreyse needle gun", in 1836. The Dreyse locked using the bolt handle rather than lugs on the bolt head like the Mauser M 98 or M16. The first rotating bolt rifle with two lugs on the bolt head was the Lebel Model 1886 rifle. The concept has been implemented on most firearms chambered for high powered cartridges since the 20th century. Design Ferdinand Ritter von Mannlicher, who had earlier developed a non-rotating bolt straight-pull rifle, developed the Steyr-Mannlicher M1895, a straight-pull rifle with a rotating bolt, which was issued to the Austro-Hungarian Army. Mannlicher then developed the M1893 auto rifle which had a screw delayed bolt and later the Mannlicher M1900 operated by a gas piston. This was an inspiration for later gas operated, semi-automatic and selective fire firearms (such as the M1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolt Action
Bolt-action is a type of manual firearm action that is operated by ''directly'' manipulating the bolt via a bolt handle, which is most commonly placed on the right-hand side of the weapon (as most users are right-handed). Most bolt-action firearms use a rotating bolt design, where the handle must first be rotated upward to unlock the bolt from the receiver, then pulled back to open the breech and allowing any spent cartridge case to be extracted and ejected. This also cocks the striker within the bolt (either on opening or closing of the bolt depending on the gun design) and engages it against the sear. When the bolt is returned to the forward position, a new cartridge (if available) is pushed out of the magazine and into the barrel chamber, and finally the breech is closed tight by rotating the handle down so the bolt head relocks on the receiver. Bolt-action firearms are generally repeating firearms, but some single-shot breechloaders also use bolt-action design as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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