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Roller-locked
In firearms operating systems, the term roller locked refers to locking the bolt with 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 ''Gerät 03'' semi-automatic rifle and ''Gerät 06'' and 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 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 was apparently not used in firearms until 1930s. Mechanism In roller locked arms in the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MG 42
The MG 42 (shortened from German: ''Maschinengewehr 42'', or "machine gun 42") is a German recoil-operated air-cooled general-purpose machine gun used extensively by the Wehrmacht and the Waffen-SS during the second half of World War II. Entering production in 1942, it was intended to supplement and replace the earlier MG 34, which was more expensive and took much longer to produce, but both weapons were produced until the end of World War II. Designed to use the standard German 7.92×57mm Mauser rifle round, be low-cost and easier to mass-produce, the MG 42 proved to be highly reliable and easy to operate. It is most notable for its very high cyclic rate for a gun using full-power service cartridges, averaging about 1,200 rounds per minute compared to around 850 for the MG 34, and 450 to 600 for other common machine guns like the M1919 Browning, FM 24/29 or Bren gun. This ability made it extremely effective in providing suppressive fire, and its unique sound led to it being ni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CZ 52
The CZ 52 (also known by the Czechoslovak military designations vz. 52, for (vz. - ''vzor'' = model) "model of 1952", and CZ 482) is a semi-automatic pistol designed by two brothers, Jan and Jaroslav Kratochvíl, in the early 1950s for the Czechoslovak military. Around 200,000 vz. 52s were made by Česká Zbrojovka in Strakonice from 1952 to 1954. Before standardizing on the 7.62×25mm vz. 52, the Czechoslovak military used several domestic and foreign pistol models in three different calibers. After 30 years of military service, the vz. 52 was eventually replaced by the 9×18mm Makarov caliber vz. 82. The CZ 52 is technically known as the vz. 52; the Czech military designation. It's often referred to as the CZ 52 to differentiate it from the vz. 52 rifle, which entered the export market before the pistol. Description The CZ 52 pistol is a roller-locked short recoil–operated, detachable box magazine–fed, single-action, semi-automatic pistol chambered for the 7.62×25 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HK G3
The Heckler & Koch G3 (''Gewehr'' 3) is a 7.62×51mm NATO, selective fire, select-fire battle rifle developed in the 1950s by the German small arms, armament manufacturer Heckler & Koch (H&K) in collaboration with the Spanish state-owned design and development agency CETME (''Centro de Estudios Técnicos de Materiales Especiales''). The modular designed G3 has over the years been exported to over 70 countries and manufactured under licence in at least 15 countries, bringing the total number built to around 7,800,000. The G3 was the service rifle of the Bundeswehr, armed forces of Germany until it was replaced by the Heckler & Koch G36, G36 in the 1990s. History The origin of the G3 can be traced back to the final years of World War II when Mauser engineers at the Light Weapon Development Group (''Abteilung 37'') at Oberndorf am Neckar designed the ''Maschinenkarabiner Gerät 06'' (MKb ''Gerät'' 06, "machine carbine device 06") prototype assault rifle chambered for the inter ... [...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] |
Rheinmetall MG 3
The MG 3 is a German general-purpose machine gun chambered for the 7.62×51mm NATO cartridge. The weapon's design is derived from the World War II era MG 42 ''Einheitsmaschinengewehr'' (Universal machine gun) that fired the 7.92×57mm Mauser round.Woźniak, Ryszard: ''Encyklopedia najnowszej broni palnej—tom 3 M-P'', page 106. Bellona, 2001. The MG 3 was standardized in the late 1950s and adopted into service with the newly formed ''Bundeswehr'', where it continues to serve to this day as a squad support weapon and a vehicle-mounted machine gun. The weapon and its derivatives have also been acquired by the armed forces of over 40 countries. Production rights to the machine gun were purchased by Italy ( MG 42/59), Spain, Pakistan (MG 1A3), Greece, Iran, Sudan and Turkey. History At the end of World War II the original technical drawings and data for the 7.92×57mm Mauser chambered MG 42 were captured by the Soviets. These would eventually find their way to Czechoslovakia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blowback (arms)
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 operatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Savage Arms
Savage Arms is an American gunmaker based in Westfield, Massachusetts, with operations in Canada. Savage makes a variety of rimfire and centerfire rifles, as well as Stevens single-shot rifles and shotguns. The company is best known for the Model 99 lever-action rifle, no longer in production, and the .300 Savage. Savage was a subsidiary of Vista Outdoor until 2019 when it was spun off. History Savage Arms was founded in 1894 by Arthur Savage in Utica, New York. Within 20 years they were producing rifles, handguns, and ammunition. Savage introduced the first hammerless lever-action rifle, the Model 1895, derived from Arthur Savage's Model 1892 rifle that he had designed for Colt in a failed bid for a US Army rifle contract that instead was won by the Krag–Jørgensen design. The Model 1895 won a New York National Guard contract, but the contract was cancelled due to political controversy. Savage was one of six companies to participate in the United States Army trials f ... [...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] |
Collet
A collet is a segmented sleeve, band or ''collar''. One of the two radial surfaces of a collet is usually tapered (i.e a truncated cone) and the other is cylindrical. The term ''collet'' commonly refers to a type of chuck that uses collets to hold either a workpiece or a tool (such as a drill) but has other mechanical applications. An external collet is a sleeve with a cylindrical inner surface and a conical outer surface. The collet can be squeezed against a matching taper such that its inner surface contracts to a slightly smaller diameter, squeezing the tool or workpiece to hold it securely. Most often the collet is made of spring steel, with one or more kerf cuts along its length to allow it to expand and contract. This type of collet holds the external surface of the tool or workpiece being clamped. This is the most usual type of collet chuck. An external collet clamps against the internal surface or bore of a hollow cylinder. The collet's taper is internal and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thompson Submachine Gun
The Thompson submachine gun (also known as the "Tommy Gun", "Chicago Typewriter", "Chicago Piano", “Trench Sweeper” or "Trench Broom") is a blowback-operated, air-cooled, magazine-fed selective-fire submachine gun, invented by United States Army Brigadier general John T. Thompson in 1918. It was originally designed to break the stalemate of trench warfare of World War I, but was not finished until after the war ended. The Thompson saw early use by the United States Marine Corps during the Banana Wars, the United States Postal Inspection Service, the Irish Republican Army, the Republic of China, and the FBI (following the Kansas City Massacre). The weapon was also sold to the general public. Because it could be obtained so easily, the Thompson became notorious during the Prohibition era as the signature weapon of various organized crime syndicates in the United States in the 1920s. It was a common sight in the media at the time, and was used by both law enforcement office ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blaser R93 Tactical
The Blaser R93 Tactical is a German bolt action sniper rifle, based on the Blaser R93 design. It has as variants the Blaser LRS 2 and Tactical 2. It is used by German and Dutch police forces as well as the Australian military and special police units. The rifles were manufactured by the German firearms manufacturer Blaser. Design The LRT (Long Range Tactical), LRS 2 (Long Range Sporter 2) and Tactical 2 rifles are straight-pull bolt-action take down sniper rifles. The straight-pull action design was introduced in the Blaser R93 hunting rifle line. These actions allows for faster follow-up shots compared to traditional turn bolt actions. The rifles are designed to fire small groups (sub 0.07 mrad (7 mm at 100 m; 0.25 moa) with factory match ammunition. The LRS 2 version, comes chambered in .223 Remington, 6mm Norma BR, 6.5×55mm, .308 Winchester and .300 Winchester Magnum. An uncommon part of its design is that it is a straight-pull bolt-action rather than a turn-bolt, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blaser R93
The Blaser R93 is a straight-pull action precision rifle offered in a multitude of calibers and barrel lengths manufactured by the German firearms manufacturer Blaser. Designed by Blasers' designer Mr. Meinhard Zeh in 1993, it had a number of features rare on modern hunting rifles, including a manual cocking system and a proprietary Blaser saddle scope mount for mounting the optic directly to the quick-change barrel In 2002, more than 100,000 complete Blaser R93 rifles had been produced. By 2017, more than 200,000 R93 rifles had been produced, but it is not clear whether the R93 Tactical variant is included in these numbers. History The predecessor of the R93 was the 60 degree turn bolt action Blaser R84, which was discontinued after the introduction of the R93 in 1993. The successor of R93, Blaser R8, was introduced in 2008. Production of the R93 ended around 2016/2017. Design features Modularity The Blaser R93 is a truly modular system built around an alumin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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