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Sturmgewehr 45
The StG 45(M) (abbreviation of Sturmgewehr 45, "Assault Rifle 45") sometimes referred to as the MP 45(M), was a prototype assault rifle developed by Mauser for the ''Wehrmacht'' at the end of World War II, using an innovative roller-delayed blowback operating system. It fired the 7.92×33mm Kurz (or "Pistolenpatrone 7.9mm") intermediate cartridge at a cyclic rate of around 450 rounds per minute. Overview The origin of this rifle 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 MKb ''Gerät'' 06 (''Maschinenkarabiner Gerät 06'' or "machine carbine instrument 06") prototype assault rifle chambered for the intermediate 7.92×33mm Kurz cartridge, first with the ''Gerät'' 06 model using a roller-locked mechanism which was unique for being gas operated, as opposed to recoil operation, originally adapted from the MG 42 machine gun, but with a fixed barrel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boulder, Colorado
Boulder is a home rule city that is the county seat and most populous municipality of Boulder County, Colorado, United States. The city population was 108,250 at the 2020 United States census, making it the 12th most populous city in Colorado. Boulder is the principal city of the Boulder, CO Metropolitan Statistical Area and an important part of the Front Range Urban Corridor. Boulder is located at the base of the foothills of the Rocky Mountains, at an elevation of above sea level. Boulder is northwest of the Colorado state capital of Denver. It is home of the main campus of the University of Colorado, the state's largest university. History On November 7, 1861, the Colorado General Assembly passed legislation to locate the University of Colorado in Boulder. On September 20, 1875, the first cornerstone was laid for the first building (Old Main) on the CU campus. The university officially opened on September 5, 1877. In 1907, Boulder adopted an anti- saloon ordinanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stamping (metalworking)
Stamping (also known as pressing) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape. Stamping includes a variety of sheet-metal forming manufacturing processes, such as punching using a machine press or stamping press, blanking, embossing, bending, flanging, and coining. This could be a single stage operation where every stroke of the press produces the desired form on the sheet metal part, or could occur through a series of stages. The process is usually carried out on sheet metal, but can also be used on other materials, such as polystyrene. Progressive dies are commonly fed from a coil of steel, coil reel for unwinding of coil to a straightener to level the coil and then into a feeder which advances the material into the press and die at a predetermined feed length. Depending on part complexity, the number of stations in the die can be determined. Stamping is usually ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point-blank Range
Point-blank range is any distance over which a certain firearm can hit a target without the need to compensate for bullet drop, and can be adjusted over a wide range of distances by sighting in the firearm. If the bullet leaves the barrel parallel to the sight, the bullet, like any object in flight, is pulled downwards by gravity, so for distant targets, the shooter must point the firearm above the target to compensate. But if the target is close enough, bullet drop will be negligible so the shooter can aim the gun straight at the target. If the sights are set so that the barrel has a small upward tilt, the bullet starts by rising and later drops. This results in a weapon that hits too low for very close targets, too high for intermediate targets, too low for very far targets, and point blank at two distances in between. For a .270 Winchester, as an example, the bullet first crosses the line of sight at about 23 metres (25 yards) as it is rising and has a maximum impact above th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzzle Rise
Muzzle rise, muzzle flip or muzzle climb refers to the tendency of a firearm's or airgun's muzzle (front end of the barrel) to rise up after firing. It more specifically refers to the seemingly unpredictable "jump" of the firearm's muzzle, caused by combined recoil from multiple shots being fired in quick succession. It has an adverse effect on maintaining accuracy with using automatic weapons or rapid-firing semi-automatic firearms, as a moving muzzle can throw off the shooter's aim, causing subsequent shots to miss the intended target. Reason The primary reason for muzzle rise is that for nearly all guns, the bore axis (longitudinal centerline of the barrel) is above the gun's center of mass, while the contact points between the shooter and the gun (e.g. grips and stock) are often all below the center of mass. When the gun is fired, the bullet motion and the escaping propellant gases exert a reactional recoil directly backwards along the bore axis, while the countering forwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Center Of Gravity
In physics, the center of mass of a distribution of mass in space (sometimes referred to as the balance point) is the unique point where the weight function, weighted relative position (vector), position of the distributed mass sums to zero. This is the point to which a force may be applied to cause a linear acceleration without an angular acceleration. Calculations in mechanics are often simplified when formulated with respect to the center of mass. It is a hypothetical point where the entire mass of an object may be assumed to be concentrated to visualise its motion. In other words, the center of mass is the particle equivalent of a given object for application of Newton's laws of motion. In the case of a single rigid body, the center of mass is fixed in relation to the body, and if the body has uniform density, it will be located at the centroid. The center of mass may be located outside the physical body, as is sometimes the case for wikt:hollow, hollow or open-shaped object ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
StG 44
The StG 44 (abbreviation of Sturmgewehr 44, "assault rifle 44") is a German assault rifle developed during World War II by Hugo Schmeisser. It is also known by its early designations as the MP 43 and MP 44 (''Maschinenpistole 43'' and ''44''). The StG 44 was an improvement of an earlier design, the Maschinenkarabiner 42(H). The StG 44 was the first successful assault rifle, with features including an intermediate cartridge, controllable automatic fire, a more compact design than a battle rifle with a higher rate of fire, and being designed primarily for hitting targets within a few hundred metres. Other rifles at the time were designed to hit targets of over a thousand meters, but this was found to be in excess of the range in which most enemy engagements actually took place. The StG 44 fulfilled its role effectively, particularly on the Eastern Front, offering a greatly increased volume of fire compared to standard infantry rifles. The StG largely influenced the Soviet AK-47, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Rifle
A battle rifle is a service rifle chambered to fire a fully powered cartridge. The term "battle rifle" is a retronym created largely out of a need to better differentiate the intermediate cartridge, intermediate-powered assault rifles (e.g. the StG-44, AK-47, M16 rifle, M16, Steyr AUG, AUG) from full-powered rifles (e.g. the FG-42, AVS-36, FN FAL, and M14 rifle, M14, as well as the H&K G3 outside of sniping uses) as both classes of modern firearms have a similar appearance and share many of the same features such as magazine (firearms), detachable magazines, pistol grips, separate upper and lower receiver (firearms), receivers etc. Battle rifles were most prominent from the 1940s to the 1970s, when they were used as Service rifle, service rifles. While modern battle rifles largely resemble modern assault rifle designs, which replaced battle rifles in most roles, the term may also describe older military full-powered semi-automatic rifles such as the M1 Garand, SVT-40, Gewehr 41, Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FG 42
The FG 42 (German: ''Fallschirmjägergewehr'' 42, "paratrooper rifle 42") is a selective-fire 7.92×57mm Mauser automatic rifle produced in Nazi Germany during World War II. The weapon was developed specifically for the use of the ''Fallschirmjäger'' airborne infantry in 1942 and was used in very limited numbers until the end of the war. It combined the characteristics and firepower of a light machine gun in a lightweight form slightly shorter (but considerably bulkier and heavier) than the standard-issue Karabiner 98k bolt-action infantry rifle. Considered one of the most advanced weapon designs of World War II, the FG 42 influenced post-war small arms development, and many features of its design, such as general shape, stock style, gas-rotating bolt operation (itself copied from the Lewis gun) and sheet metal and plastic construction were copied by the US Army when they developed the M60 machine gun. History At the time of the Battle of Crete (Operation Mercury), German ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludwig Vorgrimler
Ludwig Vorgrimler (September 7, 1912 – February 23, 1983) is the man most commonly associated with the design of the Spanish roller-delayed CETME rifle, and its prolific offspring from the German gunmaker Heckler & Koch such as the G3, HK21, P9 and MP5. Early career with Mauser Born in Freiburg, Germany, Vorgrimler worked as an engineer for several arms manufacturers over his long career. He briefly worked for the Krupp factory from January to November, 1936. From there, he was recruited by Ott-Helmuth von Lossnitzer, the director of Mauser Werke's Weapons Research Institute and Weapons Development Group. He was assigned to Department 37, which was responsible for military small arms up to 15 mm in caliber and eventually led the sub-department in charge of aircraft weapon construction. During the Second World War the roller-delayed blowback firearm action was patented by Vorgrimler together with Wilhelm Stähle but the work was not entirely completed by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamber (firearms)
In firearms, the chamber is the cavity at the back end of a breechloader's barrel or cylinder, where the cartridge is inserted before being fired. The rear opening of the chamber is the breech, and is sealed by the breechblock or the bolt. Function Rifles and pistols generally have a single chamber integral to their barrels, but revolvers have multiple chambers in their cylinder, and no chamber in their barrel. Thus, rifles and pistols can usually still be fired with the magazine removed as long as a cartridge is inserted into the chamber, while a revolver cannot be fired at all with its cylinder swung out. The act of ''chambering'' a cartridge means the insertion of a round into the chamber, either manually or through the action of the weapon, e.g., pump-action, lever-action, bolt action, or Autoloading operation generally in anticipation of firing the weapon, without need to "load" the weapon upon decision to use it (reducing the number of ''actions'' needed to disch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
