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Mk 1 Underwater Defense Gun
The M1 Underwater Defense Gun, also called the Underwater Defense Gun Mark 1 Mod 0, is an underwater firearm developed by the United States during the Cold War. Similar to other underwater firearms, it fires a special metal dart as its projectile. History The gun was developed as part of a project called TDP 3801 during the 1960s, and much of the work on it occurred at the Naval Surface Warfare Center White Oak Laboratory in Silver Spring, Maryland, US. Originally, the idea was for the LanceJet, a rocket-based weapon similar to the Gyrojet family of firearms. Still, rocket-powered weapons proved to be expensive and inaccurate, so alternatives were researched. The result was the Mk 1 Underwater Defense Gun, introduced in the early 1970s. It proved effective but, says Tom Hawkins of the nonprofit Naval Special Warfare Foundation, "It was bulky and heavy and the men never warmed up to it. It was also a signature controlled item – as in signing your name to check it out – and ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Firearm
An underwater firearm is a firearm designed for use underwater. Underwater firearms or needleguns usually fire flechettes or spear-like bolts instead of standard bullets. These may be fired by pressurised gas. History Underwater firearms were first developed in the 1960s during the Cold War as a way to arm combat divers. Design Because standard bullet ammunition does not work well underwater, underwater firearms commonly fire flechettes instead of standard bullets. The barrels of underwater pistols are typically not rifled. Rather, the fired projectile maintains its ballistic trajectory underwater by hydrodynamic effects. The lack of rifling renders these weapons relatively inaccurate when fired out of water. Underwater rifles are more powerful than underwater pistols and more accurate out of water, but underwater pistols can be manipulated more easily underwater. Among the many engineering challenges in designing underwater firearms is that of developing a weapon whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pistol
A pistol is a type of handgun, characterised by a gun barrel, barrel with an integral chamber (firearms), chamber. The word "pistol" derives from the Middle French ''pistolet'' (), meaning a small gun or knife, and first appeared in the English language when early handguns were produced in Europe. In colloquial usage, the word "pistol" is often used as a generic term to describe ''any'' type of handgun, inclusive of revolvers (which have a single barrel and a separate cylinder (firearms), cylinder housing multiple chambers) and the pocket gun, pocket-sized derringers (which are often multiple-barrel firearm, multi-barrelled). The most common type of pistol used in the contemporary era is the semi-automatic pistol. The older single-shot and lever-action pistols are now rarely seen and used primarily for nostalgic hunting and historical reenactment. Fully-automatic machine pistols are uncommon in civilian usage because of their generally poor recoil-controllability (due to the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falklands War
The Falklands War () was a ten-week undeclared war between Argentina and the United Kingdom in 1982 over two British Overseas Territories, British dependent territories in the South Atlantic: the Falkland Islands and Falkland Islands Dependencies, its territorial dependency, South Georgia and the South Sandwich Islands. The conflict began on 2 April 1982, when 1982 invasion of the Falkland Islands, Argentina invaded and Occupation of the Falkland Islands, occupied the Falkland Islands, followed by the invasion of South Georgia the next day. On 5 April, the British government dispatched a British naval forces in the Falklands War, naval task force to engage the Argentine Navy and Argentine Air Force, Air Force before making an Amphibious warfare, amphibious assault on the islands. The conflict lasted 74 days and ended with an Argentine Argentinian surrender in the Falklands War, surrender on 14 June, returning the islands to British control. In total, 649&nbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trigger (firearms)
A trigger is a mechanism (engineering), mechanism that Actuator, actuates the function of a ranged weapon such as a firearm, airgun, crossbow, or speargun. The word may also be used to describe a switch that initiates the operation of other non-shooting devices such as a animal trap, trap, a power tool, or a quick release. A small amount of energy applied to the trigger leads to the release of much more energy. Most triggers use a small flat or slightly curved lever (called the ''trigger blade'') depressed by the index finger, but some weapons such as the M2 Browning machine gun or the Iron Horse TOR ("thumb-operated receiver") use a push-button-like thumb-actuated trigger design, and others like the Springfield Armory M6 Scout use a squeeze-bar trigger similar to the "ticklers" on crossbow#Medieval Europe, medieval European crossbows. Although the word "trigger" technically implies the entire mechanism (known as the ''trigger group''), colloquially it is usually used to refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pepper-box
The pepper-box pistol or simply pepperbox (also "pepper-pot", from its resemblance to the household pepper shakers) is a multiple-barrel firearm, mostly in the form of a handgun, that has three or more gun barrels each holding a single shot. The barrels are fired in sequence by a rotating firing mechanism or, more typically, by rotating the entire barrel assembly to bring each barrel in line with a single lock or hammer, similar to rotation of a revolver's cylinder. Pepperbox guns have existed for all types of firelock firearms and metal-cased ammunition systems used in breechloading firearms: matchlock, wheellock, flintlock, caplock, pinfire, rimfire, and centerfire. The weight of multiple barrels could make the weapon unwieldy and restricted most to the form of sidearms intended for self-defence, though a few long guns were also made. Popular in the mid-19th century, the design has occasionally been revived for specialty applications. Early years This type o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Firearm
An underwater firearm is a firearm designed for use underwater. Underwater firearms or needleguns usually fire flechettes or spear-like bolts instead of standard bullets. These may be fired by pressurised gas. History Underwater firearms were first developed in the 1960s during the Cold War as a way to arm combat divers. Design Because standard bullet ammunition does not work well underwater, underwater firearms commonly fire flechettes instead of standard bullets. The barrels of underwater pistols are typically not rifled. Rather, the fired projectile maintains its ballistic trajectory underwater by hydrodynamic effects. The lack of rifling renders these weapons relatively inaccurate when fired out of water. Underwater rifles are more powerful than underwater pistols and more accurate out of water, but underwater pistols can be manipulated more easily underwater. Among the many engineering challenges in designing underwater firearms is that of developing a weapon whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold War
The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 until the dissolution of the Soviet Union in 1991. The term ''Cold war (term), cold war'' is used because there was no direct fighting between the two superpowers, though each supported opposing sides in regional conflicts known as proxy wars. In addition to the struggle for ideological and economic influence and an arms race in both conventional and Nuclear arms race, nuclear weapons, the Cold War was expressed through technological rivalries such as the Space Race, espionage, propaganda campaigns, Economic sanctions, embargoes, and sports diplomacy. After the end of World War II in 1945, during which the US and USSR had been allies, the USSR installed satellite state, satellite governments in its occupied territories in Eastern Europe and N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Spring, Maryland
Silver Spring is a census-designated place (CDP) in southeastern Montgomery County, Maryland, United States, near Washington, D.C. Although officially Unincorporated area, unincorporated, it is an edge city with a population of 81,015 at the 2020 United States census, 2020 census, making it the fifth-most-populous place in Maryland after Baltimore, Columbia, Maryland, Columbia, Germantown, Maryland, Germantown, and Waldorf, Maryland, Waldorf. Downtown Silver Spring, located next to the northern tip of Washington, D.C., is the oldest and most Urbanization, urbanized area of Silver Spring, surrounded by several inner suburban residential neighborhoods inside the Capital Beltway. Many mixed-use developments combining retail, residential, and office space have been built since 2004. Silver Spring takes its name from a mica-flecked spring discovered there in 1840 by Francis Preston Blair, who subsequently bought much of the area's surrounding land. Acorn Park, south of downtown, is be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyrojet
The Gyrojet is a family of unique firearms developed in the 1960s named for the method of gyroscope, gyroscopically stabilizing its projectiles. Rather than inert bullets, Gyrojets fire small Rocket (weapon), rockets called Microjets which have little recoil and do not require a heavy barrel or chamber to resist the pressure of the combustion gases. Velocity on leaving the tube was very low, but increased to around at . The result is a very lightweight and transportable weapon. Long out of production, today they are a coveted collector's item with prices for even the most common model ranging above $1,000. They are rarely fired; ammunition is scarce and can cost over $200 per round. History Robert Mainhardt and Art Biehl joined forces to form MBAssociates, or MBA, in order to develop Biehl's armor-piercing rocket rounds. Originally developed in a .51 caliber, the cartridges were self-contained self-propelled rockets with calibers ranging from .49 and 6mm to 20mm. A family of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heckler & Koch P11
The Heckler & Koch P11 is an underwater firearm developed in 1976 by Heckler & Koch. It is loaded using a pepper-box-like assembly, containing five sealed barrels each containing an electrically-fired projectile. Two styles of barrel assembly can be used: one containing five 7.62×36mm flechette darts for use underwater, or five 133-grain bullets for use above water. Design Since ordinary-shaped rounds are inaccurate and have a very short range when used underwater, this pistol fires steel darts underwater or traditional bullets above water. It has five barrels, each of which is loaded with a cartridge, giving the gun a pepper-box appearance, and it is electrically ignited from a battery pack in the pistol grip. Both the underwater dart and above-water bullet barrel assemblies use a sabot to hold the projectile. Each barrel is rifled in two portions: an initial large diameter designed to spin the sabot and projectile, and a second, narrower section to halt the sabot and spi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pepper-box
The pepper-box pistol or simply pepperbox (also "pepper-pot", from its resemblance to the household pepper shakers) is a multiple-barrel firearm, mostly in the form of a handgun, that has three or more gun barrels each holding a single shot. The barrels are fired in sequence by a rotating firing mechanism or, more typically, by rotating the entire barrel assembly to bring each barrel in line with a single lock or hammer, similar to rotation of a revolver's cylinder. Pepperbox guns have existed for all types of firelock firearms and metal-cased ammunition systems used in breechloading firearms: matchlock, wheellock, flintlock, caplock, pinfire, rimfire, and centerfire. The weight of multiple barrels could make the weapon unwieldy and restricted most to the form of sidearms intended for self-defence, though a few long guns were also made. Popular in the mid-19th century, the design has occasionally been revived for specialty applications. Early years This type o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiple-barrel Firearms
A multiple-barrel firearm is any type of firearm with more than one gun barrel, usually to increase the rate of fire or probability of kill, hit probability and to reduce barrel erosion or overheating. History Volley gun Multiple-barrel firearms date back to the 14th century, when the first primitive volley guns were developed. They are made with several single-shot gun barrel, barrels assembled together for firing a large number of shots, either simultaneously or in quick succession. These firearms were limited in firepower by the number of barrels bundled, and needed to be manually prepared, ignited, and reloaded after each firing. In practice the large volley guns were not particularly more useful than a cannon firing canister shot or grapeshot. Since they were still mounted on a carriage, they could be as hard to aim and move around as a heavy cannon, and the many barrels took as long (if not longer) to reload.Matthew Sharpe "Nock's Volley Gun: A Fearful Discharge" ''A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
