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Tilting Bolt
Tilting bolt action is a type of locking mechanism often used in self-loading firearms and, rarely, in straight-pull repeating rifles. Essentially, the design consists of a moving bolt driven by some mechanism, most often a piston with gas pressure from the gas port behind the muzzle. The bolt drops down into receiver recess and locks on bolt closing. Tilting the bolt up and down locks-unlocks in the breech. This tilting allows gas pressure in the barrel from firing the gun to lower to safe levels before the cartridge case is ejected. For handgun design, the tilting barrel as used in the Browning, is a similar operating mechanism. The tilting bolt has lost favor in contemporary firearm design of rifle caliber to locking systems such as the rotating bolt due to reasons such as complexity in manufacture and expense in resources, increased wearing of the surfaces acted on, higher demands on the receiver due to transfer of locking stresses to it (e. g., it can't be made from alu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PTRS-41
The PTRS-41 () is a World War II-era semi-automatic anti-tank rifle firing the 14.5×114mm cartridge. Design The PTRS-41 was produced and used by the Soviet Union during World War II. In the years between the World Wars, the Soviet Union began experimenting with different types of armour-piercing anti-tank cartridges. Finding the 12.7×108mm insufficient, they began development of what became the 14.5×114mm armour-piercing round. Rukavishnikov developed to use this cartridge, but it was not successful because of some manufacturing issues, a sufficient number of more effective anti-tank guns in the Red Army, and high expectations about new German tank armour. In 1941, the loss of huge amounts of anti-tank artillery created a need for a stop-gap anti-tank weapon, so famous USSR weapons designers such as Vasily Degtyaryov and Sergei Gavrilovich Simonov were tasked to design anti-tank rifles. Both were considered simpler and more suitable to wartime production than an updat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falling-block Action
A falling-block action (also known as a sliding-block or dropping-block action) is a single-shot firearm action in which a solid metal breechblock slides vertically in grooves cut into the breech of the weapon and is actuated by a lever. Description When the breechblock is in the closed (top) position, it seals the chamber from the high pressures created when the cartridge fires and safely transfers the recoil to the action and stock. When the breechblock is in the opened (bottom) position, the rear (breech) end of the chamber is exposed to allow ejection or extraction of the fired case and reloading of an unfired cartridge. It is a very strong action; when the breech is closed, the receiver essentially becomes a single piece of steel (as opposed to other actions that rely on lugs to lock the breech). This type of action is used on artillery pieces, as well as small arms. An additional advantage is the unobstructed loading path, which imposes no limit on the overall length of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savage Model 99
The Savage Model 99, Model 1899, and their predecessor the model 1895 are a series of hammerless lever action rifles created by the Savage Arms Company in Utica, New York. The Model 99 family featured a unique rotary magazine, and later added some detachable magazine models. The rifle was extremely popular with big game hunters and was even issued to the Montreal Home Guard during the First World War. History The earliest predecessor of the Model 1895 was the Model 1892, and it was one of the contending rifle models offered to the U.S. Army when they were looking to replace the Springfield Model 1873 trapdoor rifle. The Krag–Jørgensen was chosen over the Savage and other models. The Model 1892 was never put into production (and indeed pre-dated the actual establishment of the Savage Repeating Arms Company; the Model 1892 was a collaborative venture between Arthur Savage and probably the E.W. Bliss Company). Followed by the Model 1893 prototypes, that evolved into the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LS-26
The ''Lahti-Saloranta M/26'' (alternatively ''LS/26'') is a light machine gun which was designed by Aimo Lahti and Arvo Saloranta in 1926. The weapon was able to fire in both full automatic and semi-automatic modes. Both 20-round box and 75-round drum magazines were produced, but the Finnish Army seems to have only used the smaller 20-round magazine. In the Winter War, there were two squads in each platoon that provided covering fire for two ten-man rifle squads. In each squad, there was one M/26 gunner, one assistant and the rest of the men carrying rifles. Soldiers found it would jam when magazine was loaded to capacity. Often they would take a round out of the magazine and hope an officer did not inspect it. History The M/26 won a Finnish Army competition in 1925 where it was selected as the army's main light machine gun. Production started in 1927 at the Valtion kivääritehdas (VKT), State Rifle Factory, and lasted until 1942. More than 5,000 weapons were produced during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SIG MKMO
The SIG MKMO is a submachine gun produced by Schweizerische Industrie Gesellschaft (SIG) company in Neuhausen from 1933 to 1937. The MKMO – M = Maschinen, K = Karabiner M = Militär, O = Oben (Top ejection) – was designed for the military and to increase firepower it had a larger-capacity magazine as well as a longer barrel. Only 1,228 of these guns were produced. It saw limited adoption by Swiss police departments and the Swiss Guard at the Vatican. Finland purchased approximately 282 of the original MKMO variant, which were used by the home guard, supply units and coastal defense forces in the Continuation War The Continuation War, also known as the Second Soviet–Finnish War, was a conflict fought by Finland and Nazi Germany against the Soviet Union during World War II. It began with a Finnish declaration of war on 25 June 1941 and ended on 19 .... Design The SIG MKMO used a hesitation-locked operating system which kept the cartridge within the chamber long e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M50 Reising
The .45 Reising submachine gun was manufactured by Harrington & Richardson (H&R) Arms Company in Worcester, Massachusetts, USA, and was designed and patented by Eugene Reising in 1940. The three versions of the weapon were the Model 50, the folding stock Model 55, and the semiautomatic Model 60 rifle.Robert C. Ankony, "The US .45 Model 50 and 55 Reising submachine gun and Model 60 Semiautomatic Rifle," ''Small Arms Review,'' Jul.2008. Over 100,000 Reisings were ordered during World War II, and were initially used by the United States Navy, United States Marine Corps, Marine Corps, and the United States Coast Guard, though some were shipped to Canadian, Soviet Union, Soviet, and other allied forces to fight the Axis powers.Thomas B. Nelson, ''The World's Submachine Guns'', TBN Enterprises, 1963 History Reising was an assistant to firearm inventor John M. Browning. In this role, Reising contributed to the final design of the US .45 ACP M1911 pistol. Reising then designed a nu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blowback (firearms)
Blowback is a system of operation for self-loading firearms that obtains energy from the motion of the cartridge case as it is pushed to the rear by expanding gas created by the ignition of the propellant charge. Several blowback systems exist within this broad principle of operation, each distinguished by the methods used to control bolt movement. In most actions that use blowback operation, the breech is not locked mechanically at the time of firing: the inertia of the bolt and recoil , relative to the weight of the bullet, delay opening of the breech until the bullet has left the barrel. A few locked breech designs use a form of blowback (example: primer actuation) to perform the unlocking function. The blowback principle may be considered a simplified form of gas operation, since the cartridge case behaves like a piston driven by the powder gases. Other operating principles for self-loading firearms include delayed blowback, blow forward, gas operation, and recoil op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uk Vz
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe Northwestern Europe, or Northwest Europe, is a loosely defined subregion of Europe, overlapping Northern and Western Europe. The term is used in geographic, history, and military contexts. Geographic definitions Geographically, Northwestern ..., off the coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The UK includes the island of Great Britain, the north-eastern part of the island of Ireland, and most of List of islands of the United Kingdom, the smaller islands within the British Isles, covering . Northern Ireland shares Republic of Ireland–United Kingdom border, a land border with the Republic of Ireland; otherwise, the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. It maintains sovereignty over the British O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bren Light Machine Gun
The Bren gun (Brno-Enfield) was a series of light machine guns (LMG) made by the United Kingdom in the 1930s and used in various roles until 1992. While best known for its role as the British and Commonwealth forces' primary infantry LMG in World War II, it was also used in the Korean War and saw service throughout the latter half of the 20th century, including the 1982 Falklands War. Although fitted with a bipod, it could also be mounted on a tripod or be vehicle-mounted. The Bren gun was a licensed version of the Czechoslovak ZGB 33 light machine gun which, in turn, was a modified version of the ZB vz. 26, which British Army officials had tested during a firearms service competition in the 1930s. The designer was Václav Holek, a gun inventor and design engineer. The later Bren gun featured a distinctive top-mounted curved box magazine, conical flash hider, and quick change barrel. In the 1950s, many Bren guns were re-barrelled to accept the 7.62×51mm NATO cartridge and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZB Vz
ZB or Zb may refer to: Businesses and organisations * Monarch Airlines (IATA code ZB) * Zbrojovka Brno, a former Czechoslovakian state producer of small weapons and munitions * Zentralbahn, a Swiss railway * Zentralblatt MATH, now zbMATH, international mathematics article reviewing service Computing * Zettabit (Zb), a unit of information used, for example, to quantify computer memory or storage capacity * Zettabyte (ZB), a unit of information used, for example, to quantify computer memory or storage capacity Other uses * MG Magnette ZB, the second iteration of the MG saloon of the 1950s * Newstalk ZB, a national talkback station in New Zealand, whose callsign is ZB * Codename of the 2003 to 2006 and 2008 to 2010 Dodge Viper The Dodge Viper is a sports car that was manufactured by Dodge (by Street & Racing Technology, SRT for 2013 and 2014), a division of American car manufacturer Chrysler from 1992 until 2017, having taken a brief hiatus in 2007 and from 2011 to 20 ... ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
